Hello plant people! This is a pretty in depth topic but I hope you enjoy it! gardeningincanada.net/rapid-growth-from-houseplants/ Westcoast Seeds Affiliate Link: bit.ly/33mGGaI Seeds Now: www.seedsnow.com/?rfsn=6354409.1f000b Join our monthly newsletter! newsletter.gardeningincanada.net Website/Blog & FREE printables: gardeningincanada.net Leave Me A Voice Message To Be Included In The Podcast: memo.fm/gardeningincanada/ Planners are available here gardeningincanada.net/support/ 👩🔬Patreon: www.patreon.com/gardeningincanada
Hey there my fellow plant nerd! I am learning all that I can about Korean natural farming, I found a book called Jadam, ultra low cost farming, there are solutions like lactobacillus, Jadam Microbial solution aka JMS, and all sorts of interesting solutions, im saving up to buy the book but in the mean time am learning from other youtubers that have embraced the methods, I really want to learn what you think about it, and teach us how to make the solutions if possible. Please look into it, the book is on Amazon. My name is Adam, I live in Orlando, Florida USA, our soil here is grey sand with no hope of natural organic matter, I actually went to the woods looking for healthier soil and couldn't find any, I cant understand how a forest could be without tons of compost but thats how it is here, anyway Im starting a business this year selling tomatoes grown from my yard and need all the help I can get in amending the soil here. I have tons of questions but feel I already wrote too much. (Quick Question) Should I till in cover crops or leave on top? Crimson clover
This was really interesting to me! I have been wondering what temp and humidity to have my IKEA cabinets at and what other people were saying just isn't working. Things have been pretty stagnant for me so I'm upping the temp on the heat mats to see if I can get the temperature and humidity in a good VPD range. It will be fun to play around with things and see if I can get it in a good VPD range - and especially to see what it does to the growth on my plants!
Thank you for putting out this video! I was already coming to understand this with what I call my ‘trifecta’ Light, Nutrients, & Humidity. But having you explain the science behind it makes it click in my head. I have a plant graveyard that I have experimented on to understand how to grow in my basement apartment. Having to juggle my environmental factors, passive hydroponics, and no natural sun took a toll on my plants. Happily, I’ve gotten to the point where I have a thriving collection. Thanks in part to this lovely plant community and treasures like your channel. I know how time consuming this is and I truly appreciate the work you put in
This explains a lot of why my houseplants struggle in winter! The room itself is cool and has a humidifier, but they're in a south-facing window with direct sunlight, so the leaves are way hotter than the rest of the room and they aren't getting enough humidity with the humidifier on low.
I love your comments on cannabis growers. I have never grown myself, but I whenever I am looking for technical information on indoor growing for other plants (lighting etc) I always look to the cannabis forums.
Awesome video! Very good information for a newer houseplant hobbyist! Also love the dogs in the background, it’s real life. Especially when they snore 😴. Thank you 😊
I started watching houseplant channels only a month ago. I've watched a bunch of your videos the past few weeks and loved them all, but this one really takes the cake. It's such a gift to all of us determined to understand why our plants do what they do ... the actual mechanisms. If I've learned one thing, it's that science talks and opinions walk. Thanks, thanks, thanks for talking so well.
I’m glad some understand this video because it went over my head completely. I have thirty five plant through my home and they are all doing well. No mold on the soil, everything seems to be doing well. The only thing is my Christmas cactus doesn’t want to bloom even though I followed all the advice . I think I’m just going to keep an eye on the plants and not worry until I see problems🤷♀️🤷♀️🤷♀️🤔🧐
House planter here! 🙋♂️ This does make sense! My Meyer lemon tree seedlings like it at 60% humidity and below 80 F temperature. Every time I get even close to 60%, it’s sweating in my greenhouse tent. I have one of those infrared guns & a humidifier and I have been documenting the numbers and making adjustments according to the readings. I can’t seem to find the sweet spot. But I think this formula will help. Thanks! 🙏
A great tool I couldn't do without is my Govee Bluetooth hygrometer/thermometer. *Thanks Memo from housePlantyGoodness!* It calculates everything including vpd, graphs it and is right on my phone. Even alerts me if my numbers go off track. Get the multipack, it's worth it! Especially if you have a cabinet or multiple places to keep track of. This video is exactly what I was looking for! Thank you SO much. This is not being spoken about nearly enough in the plant community. Everything is geared towards cannabis. You can do the adjustments of course but it's so nice to find someone breaking it down for houseplants. Keep up the science! We need you, lol. Take care.
@@GardeningInCanada Nice! I only got one Govee and I definitely regret that, so I was just about to order at least one more. Possibly 2. I'm tired of moving it around, lol. I'd much rather support you given a choice! What's the link to your website and do you ship to the USA? I hope this finds you well and you've had a great day!
@@GardeningInCanada Right on time 😊 I don't know if you're trying to keep it in Canada, I'm in the US, but I'll send a message through the website saying I'm interested! I even have something to compare it to, if that's helpful at all. Thank you so much for your time and the information!! I very much look forward to the next video 😊 Be well 🌺
Awesome video. I have a grow tent and a bunch of cabinets, and I've always tried to keep the temp around the same as the humidity (like 80%ish). Very much a wow player with the min/maxing that can be done, so I look forward to seeing if there's any changes I can make to have my plants grow better! Having a definitive goal to shoot for is definately helpful! 😀
Great video! Thanks for sharing this! A few months ago I had a pepper plant with edema, and I was unsure how to treat it or prevent it from happening to other plants. This makes so much sense.
I love that this ties my theoretical plant physiology knowledge to the reality of houseplant care! I'm surprised by how high the temperature should be to match 80% humidity. Isn't there a danger to fry the plants? And how can we figure out what the max temperature should be?
Great question. So the frying at high temperatures happens when the humidity is too low. The best way to put this into perspective is to google the temperature ranges of where your plant is native too. You will be surprised by how hot some these environments can be.
14:10 Was just thinking for I need this series of information last. Glad to have found and subbed to your channel in the mean time. YT had this on the top for me today. Good info all around so far. Look forward to the other channel having more content.
Hi Ashley, THis was an amazing video!. Please do more science-based content like this one! My questions are; How important is VPD at night? Do the temperature and humidity percentages change at night?
We need more math. I never thought I’d say that but it’s true. The calculator was super easy to use and you explained it in a very cohesive way. Really enjoyed this video, and the dog asmr in the background. He’s banging something back there LOL
Thank you so much for this! I am really happy to find advice from a science minded person, not hearsay from someone else who just happens to also buy lots of plants like I do! I laughed because the calculator website is the same one I used to get through my bio/chem/physics courses. Now it'll save my arse with my plants, as well! You rock don't ever change :)
Very interesting! I just set up a little indoor greenhouse today, so this is timely! Learned I need to up the humidity just a bit more. Also, it makes me feel ba bit better about my low humidity in the house as I landed right in the green with the temps I keep my house at.
Thank you. I just heard about VPD the other day. I was looking for a video that could tell me more specifically in relationship the humidity to keep in my indoor greenhouse. This was very informative.
@@GardeningInCanada I saw someone posted that chart in one of the Facebook plant groups I'm in. I don't recall which one. I thought - I need more context. So I went looking online to find out more.
How much responsibility lies on the plants' ability to transport water from the soil and throughout the plant, for causing different humidity requirements in different plants? What else is affecting this, e.g. size of stomata, how easily the plant can open/close their stomata, etc.? Loved this video!!!
That’s a great question. If you watch my video on snake plants I talk a little bit about C3 and C4 plants. This would give you the best answer as to why some plants have different requirements for humidity.
This is great! If you have an AC Infinity controller like I do it shows temp, humidity & VPD. I wasn’t sure what it was thanks for the help. I’m steady at 1.1kPa according to the last month in my flower tent.
And back with the results! After hearing about how dry everyone's houses get in winter, I bought a couple of hygrometers to check my home and was pretty happy with my 65% relative humidity (rainy Seattle). But it looks like that is too high for our indoor temp of 68 F (20 C), giving me a VPD of .82 kPa. So if I'm reading this right, I actually want to bring my humidity down to about 50%. Or my temp up to 80 F 🥵
Hi, thanks for all of your content! How can we apply this in the summer if one doesn't have an AC? It gets about 30/35°C where i live and keeping the humidity in the room at 80% would probably cause mold issues so I'm wondering what course of action would be best. Thanks!
Just started my first steps with incorporating VPD in the tent. I found a VPD calculator app that seems to work well. It uses space temp, RH, and leaf temps to output VPD. It also lists desirable VPD ranges for various plant stages. I think it's a game changer. After a week of monitoring and dialing in, I see that the plants are responding in a positive way. Thanks for the video.
I'm so glad I found your channel. My smart meters just started providing the VPD reading for me and I was wondering what that meant.. Also, my grow tent hasnt been doing too good and i think you just told me why. It's in the basement with 80% humidity and 60-65F temps. I'll have to get working on correcting this.
Loved this! Apparently for the temperature I keep my room the humidity should be over 60% which…. Not happening lol my humidifier struggles to get the humidity past 40% 😅
So i place my plants on a South facing window that gets Direct Sunlight and makes the window area hotter than the rest if my home. Does that mean i should water the soil more often and spray water on leaves to help them grow more efficiently????
Wow, this is so fascinating! I wonder if VPD has something to do with what people call a winter dormancy/rest? I grow a lot of orchids and other epiphytes and I've been told some of them tend to die after a few years if they don't get a cold rest during the winter. I haven't personally encountered it, but I can't help but wonder! I guess the plant is not able to "reset" their stores of sugars and nutrients? I also have a homemade IKEA greenhouse with average day temps around 78 F and humidity in the 70-80% range. I'm definitely going to try those formulas!
Great show. Just the needed information. I have some maturing plants in a controlled environment. Because of equipment and sensitivity limits I can run a relatively low VPD (1.1 kPa-1.36 kPa) or a bit high VPD (1.3 kPa - 1.65 kPa). Which option should I choose? Stress them a bit or give them an easy life?
@@GardeningInCanada Good job science doesn't care about Hurt Feelings😀👍 basting you say?..Now then, a turkey baster is a useful thing in the indoor garden hahaha....btw I find thin plastic sheet invaluable for vpd ....It wouldn't surprise me if the average gardener took 10 years for vpd to appear their radar of awareness.... so folks, save yourself some time and heed this advanced video......heyyyyyy, I just noticed you're a redhead WITH brown eyes!..Mmmm..🤩
We need to get you a web developer! I think it would be sooo cool (and a good source of passive income for you) to put the formulas like this on a page so people can plug in their numbers, and get their results! But you share a lot of these and I wish I had them all in one note book! I love your stuff! I swear it's more educational than the courses I am taking in college. (I started a sentence with But... lol bad writing)
As one of those cannabis people, i can confirm, getting the climate right is hard and can be very costly. It's a constant tial and error. If you error a little too much, it will make your plants very unhappy.
I have a potentially related question. I have a terrarium style begonia whose roots have been uncovered by sphagnum for almost a year. The roots have gradually turned an orange color. I thought it might be a type of oxidation from being exposed to air, light ect. What are your thoughts?
It’s likely a hardening on the outer layers and ultimately a staining from decomp. So roots to us look like tubes but in reality they are almost like a bunch of tiny plates stacked up on eachother. So as those plates thicken to protect from dehydration in your case it can cause also a staining effect. Completely normal don’t stress it
@@GardeningInCanada Thank you for the information! So the plant will trigger the roots to thicken to prevent dehydration. I'm assuming because the plant thinks since the roots are exposed to air/wind/light its more prone to dehydration. What exactly causes the hardening? the exposure to the "elements" or an internal process? Thank you!!
Hi Ashley, Love your nerdy videos! Have plant issue question, I have a fiddle leaf in my sunroom, he's about 7 years old and 7 feet tall. Been doing great in the room, then I bumped up my humidity to about 60-62%; I had been keeping it at 50-53%. I bumped for other aroids in the room. So all of the sudden my fiddle started dropping leaves, very quickly, some yellowing and just leaf drop. What's going on!!! I can't figure it out, nothing else has changed in the room. Any suggestions? Thanks
So it’s likely that the plan isn’t used to those levels of humidity. So the old leaves have a certain number of stomata used to regulate based on the old humidity. Your new leaves that will come in at the new humidity will obviously have the stomata and the apparatus to deal with your new higher humidity.
Great video! Have you already did a commentary of the movie, “Martian”? More specifically, the scenes where Matt Damon is growing potatoes? We would love to watch you science the sh*t out of it with some relevant math to help us understand.
could you use one of those thermal lazer pointers to read your plant leaves for vpd calculation? additionally, can you automate a heater mat in one of the cabinets with say a AC infinity product and a ventilation fan?
I use humidifiers in my CBD grow tents. I keep the tents at about 50% RH when in veg state but I lower it to 30% +/- when they are in flower to avoid mold. I also closely monitor air circulation, PH, EC. I water according to the needs of the plants (I use a moisture meter) and I always add Aloe Powder or Yucca powder to the water to reduce any NPK salt build-ups and to make the water wetter and things like kelp and fish emulsions and a few other things besides fertilizer. Anyhow, just me bragging :)
So is the chart showing the “ambient VPD”? I bought a hygrometer that has VPD on it but I’m not sure what it’s measuring if VPD is based on the difference between the room VPD and the leaf surface VPD.
Holy Moly! Here I am fighting to keep my to keep my humidity above 30, but help me to make sure I am understanding this correctly! Daytime temp in our home is consistent at 21, so I need to keep my RH between 22% and 52%? Which it is, but at night our home temp drops to 16.5 so I need to keep humidity below 36? So rule of thumb is: higher the heat, higher the humidity? So, for a plant like my P. el choco that seems to need higher humidity, there's no point (maybe point is the wrong word, it's not optimum) without increasing the temp too? Am I simplifying this too much?
Yea exactly. You’re dead on! So if you know a plant prefers 60% humidity for example you should increase the heat of the plants environment to support that humidity actually being ambient
@@GardeningInCanada I think of all your vids this is the one that's going to change the way I grow my plants. I've had a seedling heat mat forever and just never knew why to use it. I seriously just added it under one of my prob boxes. You are the absolute best. THANK YOU!
That's pretty interesting. I'm well outside of that range however I only get direct southern light in the winter, due to large maple and oak trees in my backyard, which leaves my Christmas cactus very confused and refusing to flower. I bought a cheap hygrometer, which does appear to work, however when I run the ionizing humidifier, it doesn't register on the meter, even though you can see the vapour haze in the sunlight. Cooking and showering immediately registers. I think it must not be able to read the wet bulb temperature of the ionized water. Any thoughts?
@@GardeningInCanada I do, but I still tend to over water. It started to bloom and had two flowers but then it saw the light as it were and shed the flowers. I might try switching out the plastic pot for a terracotta. That said, I have a poinsettia turning red in full sun. So who knows.
Wow, okay so I'm in the West where we battle black mould basically daily. It's very humid here & we use a dehumidifier. I'm happy when the ambient humidity is 70-72%. A 'simplified' ambient look at 72% - the chart says I need to raise the temperature to 30 + celsius, yikes that is so not going to happen! The solution then is to lower the humidity a minimum of 50%?? Am I getting it? And can I be successful with this simplified formula?? Sure would appreciate your time.
@@GardeningInCanada Lol, oh yes I know that causes mould ;) But for indoor tropicals can I use the chart as 'ambient' RH - I think you said no? And if I keep it at 72% RH (which is comfortable to me) I need a 30 degree temp as ideal? Then if I want to keep the temp at 20, I actually need to lower my humidity to 50RH?? Wow, 50 really seems low to me - every vid I've watched for over 3 years is all about high, high, high & more higher humidity!! So, I though I had it made in the humidity lottery. This is a very interesting subject, much appreciated!
The reason nobody talks about it is that VPD = absolute humidity (AH), which everybody knows has been decided many decades ago was a less-relevant measure than relative humidity (RH). VPD is just putting absolute humidity on a different type of scale. It's like C & F both measure temperature, same thing on a different scale. Long ago it was decided that RH (AH combined with temp) gives us more overall info relative to the plant's needs than just AH (same as VPD), since both are measuring water vapor, but AH/VPD just lack the temperature factor. VPD sounds more "sciency". Almost all who use VPD trying to appear sciency, but ironically don't understand they are literally talking about absolute humidity, like in this video and in many recent published studies.
What about Hemp . I was taking CBD with very min THC . But I wanted to learn more about CB2 hemp. Hemp has a lot of good terpenes and other healing as CBD without THC but no one is talking about it ..WHAT and WHY ?
I'm just slightly surprised that you didn't mention cleaning the leaves, as that seems an important factor here. No leaf-shine, just water on a clean cloth to open up the leaves to proper respiration.
Woah…I bet a bunch of gardeners lost you on the first turn…my experience in New Orleans (a bit different from Canada maybe) anyway humidity is always high in my grow room…temperature is usually high also, the only thing that works for me is massive air flow and even air conditioning in the heat of summer. I have 2 16inch Hurricane Oscillating fans in a 12’X12’ area….anyway I think I agree with you that to get best growth you need a gradient across the plant, you want water leaving the leaves and water and nutrients being sucked up the roots…move some air past your green babies….
@@GardeningInCanada Certainly not boring…to me at least. I am a chemist and it really is not that tough of a calculation, however I find that when there is dirt under my fingernails my IQ slips by a few points…maybe(definitely) I just enjoy dumbing out while gardening.
VPD = inverse RH. If you have a low VPD increase humidity, if it's high decrease humidity. This is just science complicating common sense. Most plant ppl commonly understand each species needs it's own amount of humidity and that varies by temperature. IRL, ppl almost always just refer to RH as humidity because there's no point in discussing absolute humidity outside of temperature in the real world. A suggestion to adjust your RH or VPD amounts to exactly the same thing.
Thanks for the video. This is a very interesting subject. I have a few words of constructive criticism for you to either use or discard, whichever you wish. The video is unnecessarily long. I would bet most people were interested by the title but stopped watching once they realized how long it is and how long it's going to take before you give them the info they want. I know it's hard to trim things down sometimes but this would be a lot easier to sit through if it were not as verbose. The audio has some issues that make it a bit frustrating to listen to. Because of the very slow pace, I sped up the video. This means I have to turn the volume up in order to keep it sounding clear. The dogs are super cute but the sound of them walking around gets picked up by the microphone and that became frustrating after a while. You also have a tendency to use vocal fry, which a lot of people find unpleasant or irritating. It's a fairly simple thing to correct and there are videos here on UA-cam that could help. Some content creators appreciate this kind of feedback because it lets them know what they can improve in order to be more appealing to a wider audience. Others get offended and take it as a personal attack. Please don't receive it that way because I really like you and think your channel is great. I'd like to see you keep going and keep building an audience.
Hello plant people! This is a pretty in depth topic but I hope you enjoy it!
gardeningincanada.net/rapid-growth-from-houseplants/
Westcoast Seeds Affiliate Link: bit.ly/33mGGaI
Seeds Now: www.seedsnow.com/?rfsn=6354409.1f000b
Join our monthly newsletter! newsletter.gardeningincanada.net
Website/Blog & FREE printables: gardeningincanada.net
Leave Me A Voice Message To Be Included In The Podcast: memo.fm/gardeningincanada/
Planners are available here gardeningincanada.net/support/
👩🔬Patreon: www.patreon.com/gardeningincanada
Hey there my fellow plant nerd! I am learning all that I can about Korean natural farming, I found a book called Jadam, ultra low cost farming, there are solutions like lactobacillus, Jadam Microbial solution aka JMS, and all sorts of interesting solutions, im saving up to buy the book but in the mean time am learning from other youtubers that have embraced the methods, I really want to learn what you think about it, and teach us how to make the solutions if possible. Please look into it, the book is on Amazon. My name is Adam, I live in Orlando, Florida USA, our soil here is grey sand with no hope of natural organic matter, I actually went to the woods looking for healthier soil and couldn't find any, I cant understand how a forest could be without tons of compost but thats how it is here, anyway Im starting a business this year selling tomatoes grown from my yard and need all the help I can get in amending the soil here. I have tons of questions but feel I already wrote too much. (Quick Question) Should I till in cover crops or leave on top? Crimson clover
This was really interesting to me! I have been wondering what temp and humidity to have my IKEA cabinets at and what other people were saying just isn't working. Things have been pretty stagnant for me so I'm upping the temp on the heat mats to see if I can get the temperature and humidity in a good VPD range. It will be fun to play around with things and see if I can get it in a good VPD range - and especially to see what it does to the growth on my plants!
Yea absolutely! Let me know how it works out
This us definitely the type of content houseplant people want! Give me tips that actually work and are science backed!
Yes help the Houseplant community enjoys this.
Thank you for putting out this video! I was already coming to understand this with what I call my ‘trifecta’ Light, Nutrients, & Humidity. But having you explain the science behind it makes it click in my head. I have a plant graveyard that I have experimented on to understand how to grow in my basement apartment. Having to juggle my environmental factors, passive hydroponics, and no natural sun took a toll on my plants. Happily, I’ve gotten to the point where I have a thriving collection. Thanks in part to this lovely plant community and treasures like your channel. I know how time consuming this is and I truly appreciate the work you put in
Glad you enjoyed!
This explains a lot of why my houseplants struggle in winter! The room itself is cool and has a humidifier, but they're in a south-facing window with direct sunlight, so the leaves are way hotter than the rest of the room and they aren't getting enough humidity with the humidifier on low.
Winter is totally the time when this applies most!
I love your comments on cannabis growers. I have never grown myself, but I whenever I am looking for technical information on indoor growing for other plants (lighting etc) I always look to the cannabis forums.
They are RANK! I respect it but even I catch myself getting ready for a worm hole of info
This is essentially the heart of hydroponic growing👍🏽
Absolutely
Awesome video! Very good information for a newer houseplant hobbyist! Also love the dogs in the background, it’s real life. Especially when they snore 😴. Thank you 😊
They are so attention seeking sometimes 🙄
I started watching houseplant channels only a month ago. I've watched a bunch of your videos the past few weeks and loved them all, but this one really takes the cake. It's such a gift to all of us determined to understand why our plants do what they do ... the actual mechanisms. If I've learned one thing, it's that science talks and opinions walk. Thanks, thanks, thanks for talking so well.
Thank you! Glad you are enjoying so much
I’m glad some understand this video because it went over my head completely. I have thirty five plant through my home and they are all doing well. No mold on the soil, everything seems to be doing well. The only thing is my Christmas cactus doesn’t want to bloom even though I followed all the advice . I think I’m just going to keep an eye on the plants and not worry until I see problems🤷♀️🤷♀️🤷♀️🤔🧐
I'm glad I watched your video. I've been growing House plants for 30 years and this is all new stuff to me.
That's great!
House planter here! 🙋♂️
This does make sense! My Meyer lemon tree seedlings like it at 60% humidity and below 80 F temperature. Every time I get even close to 60%, it’s sweating in my greenhouse tent. I have one of those infrared guns & a humidifier and I have been documenting the numbers and making adjustments according to the readings. I can’t seem to find the sweet spot. But I think this formula will help. Thanks! 🙏
A great tool I couldn't do without is my Govee Bluetooth hygrometer/thermometer. *Thanks Memo from housePlantyGoodness!* It calculates everything including vpd, graphs it and is right on my phone. Even alerts me if my numbers go off track. Get the multipack, it's worth it! Especially if you have a cabinet or multiple places to keep track of. This video is exactly what I was looking for! Thank you SO much. This is not being spoken about nearly enough in the plant community. Everything is geared towards cannabis. You can do the adjustments of course but it's so nice to find someone breaking it down for houseplants. Keep up the science! We need you, lol. Take care.
That’s so funny! We just launched our Beta version of this
@@GardeningInCanada Nice! I only got one Govee and I definitely regret that, so I was just about to order at least one more. Possibly 2. I'm tired of moving it around, lol. I'd much rather support you given a choice! What's the link to your website and do you ship to the USA? I hope this finds you well and you've had a great day!
@@GardeningInCanada I found your website but I don't see the hygrometer? The planners look amazing though!
Oh that’s through a different company earthone.io/
We are doing beta and trying to get users to take on testing for us atm
@@GardeningInCanada Right on time 😊 I don't know if you're trying to keep it in Canada, I'm in the US, but I'll send a message through the website saying I'm interested! I even have something to compare it to, if that's helpful at all. Thank you so much for your time and the information!! I very much look forward to the next video 😊 Be well 🌺
loved it ...heard of vpd before but now much clearer on what it does ...thank you ! stay bright , love this channel !
Yay! Love this!
Yesss more nerdy houseplant content! Love the real science over trendy tips with no trustworthy evidence :)
Yes!v very true
Awesome video. I have a grow tent and a bunch of cabinets, and I've always tried to keep the temp around the same as the humidity (like 80%ish). Very much a wow player with the min/maxing that can be done, so I look forward to seeing if there's any changes I can make to have my plants grow better! Having a definitive goal to shoot for is definately helpful! 😀
That’s awesome!
This is amazing video and something I’ve never heard about before! You’ve convinced me to get a humidifier for my super dry climate
Great video! Thanks for sharing this! A few months ago I had a pepper plant with edema, and I was unsure how to treat it or prevent it from happening to other plants. This makes so much sense.
Oh yea! That would totally apply to this
Thanks, Ashley, that was awesome. You spelt it out. Thanks Again.
Glad you enjoyed it
Holy cow this video was super informative. I wish there was a scientific journal that was tailored for papers on houseplants haha
Ha ha I totally agree with that. Unfortunately there’s no money in the pretty plants it’s about feeding the world more so
I love that this ties my theoretical plant physiology knowledge to the reality of houseplant care! I'm surprised by how high the temperature should be to match 80% humidity. Isn't there a danger to fry the plants? And how can we figure out what the max temperature should be?
Great question. So the frying at high temperatures happens when the humidity is too low. The best way to put this into perspective is to google the temperature ranges of where your plant is native too. You will be surprised by how hot some these environments can be.
14:10
Was just thinking for I need this series of information last.
Glad to have found and subbed to your channel in the mean time. YT had this on the top for me today.
Good info all around so far.
Look forward to the other channel having more content.
Welcome aboard!
Ahhhh! You just saved me and my babies. 🤧🤧🤧 thank you so much!
You're welcome!!
Hi Ashley, THis was an amazing video!. Please do more science-based content like this one! My questions are; How important is VPD at night? Do the temperature and humidity percentages change at night?
We need more math. I never thought I’d say that but it’s true. The calculator was super easy to use and you explained it in a very cohesive way. Really enjoyed this video, and the dog asmr in the background. He’s banging something back there LOL
His dang tail haha
Thank you so much for this! I am really happy to find advice from a science minded person, not hearsay from someone else who just happens to also buy lots of plants like I do! I laughed because the calculator website is the same one I used to get through my bio/chem/physics courses. Now it'll save my arse with my plants, as well! You rock don't ever change :)
This is pretty awesome information.
Might explain a few things.
I ❤ science.
Glad you enjoyed it!
Very interesting! I just set up a little indoor greenhouse today, so this is timely! Learned I need to up the humidity just a bit more. Also, it makes me feel ba bit better about my low humidity in the house as I landed right in the green with the temps I keep my house at.
Yea I mean lower humidity isn’t always a bad thing!
Appreciate all the plant knowledge you share!! Thank you so much !!
Glad you enjoy!
I have been looking for a video like this. Thumbs up for the super nerdy stuff 😄
Thank you. I just heard about VPD the other day. I was looking for a video that could tell me more specifically in relationship the humidity to keep in my indoor greenhouse. This was very informative.
Woohoo! Where did you hear able it?
@@GardeningInCanada I saw someone posted that chart in one of the Facebook plant groups I'm in. I don't recall which one. I thought - I need more context. So I went looking online to find out more.
Such awesome info 🥰
Glad you enjoyed
Thank you so much for a more science based video! I love geeking out on this stuff!
Glad you enjoyed!
How much responsibility lies on the plants' ability to transport water from the soil and throughout the plant, for causing different humidity requirements in different plants? What else is affecting this, e.g. size of stomata, how easily the plant can open/close their stomata, etc.?
Loved this video!!!
That’s a great question. If you watch my video on snake plants I talk a little bit about C3 and C4 plants. This would give you the best answer as to why some plants have different requirements for humidity.
Thank you this was vary helpful and informative. Also the puppies are so cutest.
They are so attention seeking I need to have them the room with me. Despite the fact that they are loud!
Thanks for the video Ashley!
Anytime!
This is great! If you have an AC Infinity controller like I do it shows temp, humidity & VPD. I wasn’t sure what it was thanks for the help. I’m steady at 1.1kPa according to the last month in my flower tent.
Oh that’s super nice! 1.1 is a good level
Sigh thank you for this! ❤️❤️❤️ Please give us more sciency nerdy stuff, i love it!
HAHA glad you enjoyed!
This is really interesting info. I haven't seen anyone else talk about it, but it makes a lot of sense. Off to calculate my VPD.
Glad it is something new!
And back with the results! After hearing about how dry everyone's houses get in winter, I bought a couple of hygrometers to check my home and was pretty happy with my 65% relative humidity (rainy Seattle). But it looks like that is too high for our indoor temp of 68 F (20 C), giving me a VPD of .82 kPa. So if I'm reading this right, I actually want to bring my humidity down to about 50%. Or my temp up to 80 F 🥵
Vpd and dli is where it's at .. great vid..
Yea! Totally agree
Hi, thanks for all of your content! How can we apply this in the summer if one doesn't have an AC? It gets about 30/35°C where i live and keeping the humidity in the room at 80% would probably cause mold issues so I'm wondering what course of action would be best.
Thanks!
Oh yes if it gets warm you wanna bump up that humidity whenever possible!
Just started my first steps with incorporating VPD in the tent. I found a VPD calculator app that seems to work well. It uses space temp, RH, and leaf temps to output VPD. It also lists desirable VPD ranges for various plant stages. I think it's a game changer. After a week of monitoring and dialing in, I see that the plants are responding in a positive way. Thanks for the video.
That is awesome!
Thanks
Anytime
I'm so glad I found your channel. My smart meters just started providing the VPD reading for me and I was wondering what that meant.. Also, my grow tent hasnt been doing too good and i think you just told me why. It's in the basement with 80% humidity and 60-65F temps. I'll have to get working on correcting this.
Oh yes! That’s likely the case
So in a nut shell- if it’s 72F in my house then humidity should be 72%?
It is showing 65% - 70%
Loved this! Apparently for the temperature I keep my room the humidity should be over 60% which…. Not happening lol my humidifier struggles to get the humidity past 40% 😅
Haha uhoh! Try a tent or a smaller space it may help!
@@GardeningInCanada Yes I ditched the humidifier it rusted my fans, now I just use very thin plastic sheet and the growth is phenomenal.
So i place my plants on a South facing window that gets Direct Sunlight and makes the window area hotter than the rest if my home. Does that mean i should water the soil more often and spray water on leaves to help them grow more efficiently????
If it’s in intense heat and sun make sure the soil is moist a majority of the time
Wow, this is so fascinating! I wonder if VPD has something to do with what people call a winter dormancy/rest? I grow a lot of orchids and other epiphytes and I've been told some of them tend to die after a few years if they don't get a cold rest during the winter. I haven't personally encountered it, but I can't help but wonder! I guess the plant is not able to "reset" their stores of sugars and nutrients?
I also have a homemade IKEA greenhouse with average day temps around 78 F and humidity in the 70-80% range. I'm definitely going to try those formulas!
Oh yea it will counter “dormancy”
Great show. Just the needed information. I have some maturing plants in a controlled environment. Because of equipment and sensitivity limits I can run a relatively low VPD (1.1 kPa-1.36 kPa) or a bit high VPD (1.3 kPa - 1.65 kPa).
Which option should I choose? Stress them a bit or give them an easy life?
What types of plants are we talking? Foliage or cannabis/fruiting?
@@GardeningInCanada fruiting
I would vote for stress if that’s the case. As long as its not autoflowering
Haha...love the straight talking at the end🤣👍 couldn't agree with you more.
😅 sometimes I get in trouble for that. I just had a comment basting me haha
@@GardeningInCanada Good job science doesn't care about Hurt Feelings😀👍 basting you say?..Now then, a turkey baster is a useful thing in the indoor garden hahaha....btw I find thin plastic sheet invaluable for vpd ....It wouldn't surprise me if the average gardener took 10 years for vpd to appear their radar of awareness.... so folks, save yourself some time and heed this advanced video......heyyyyyy, I just noticed you're a redhead WITH brown eyes!..Mmmm..🤩
We need to get you a web developer! I think it would be sooo cool (and a good source of passive income for you) to put the formulas like this on a page so people can plug in their numbers, and get their results! But you share a lot of these and I wish I had them all in one note book! I love your stuff! I swear it's more educational than the courses I am taking in college. (I started a sentence with But... lol bad writing)
Oh I wish. I am the worst website person ever. It’s a literally a struggle for me to even make a blog post some days 😂
Woohoo, this reminds me of my thermo class in college!
Haha love that!
As one of those cannabis people, i can confirm, getting the climate right is hard and can be very costly. It's a constant tial and error. If you error a little too much, it will make your plants very unhappy.
I have a potentially related question. I have a terrarium style begonia whose roots have been uncovered by sphagnum for almost a year. The roots have gradually turned an orange color. I thought it might be a type of oxidation from being exposed to air, light ect. What are your thoughts?
It’s likely a hardening on the outer layers and ultimately a staining from decomp. So roots to us look like tubes but in reality they are almost like a bunch of tiny plates stacked up on eachother. So as those plates thicken to protect from dehydration in your case it can cause also a staining effect. Completely normal don’t stress it
@@GardeningInCanada Thank you for the information! So the plant will trigger the roots to thicken to prevent dehydration. I'm assuming because the plant thinks since the roots are exposed to air/wind/light its more prone to dehydration. What exactly causes the hardening? the exposure to the "elements" or an internal process? Thank you!!
Anytime!
Does more chlorophyl in plants equal more Photosynthesis? My plants are greener after i sprayed epsom salt.
Technically yes. But keep in might more nitrogen and fertilizer can also result in really soft growth. Which bugs and pests love to chew on.
Hi Ashley, Love your nerdy videos! Have plant issue question, I have a fiddle leaf in my sunroom, he's about 7 years old and 7 feet tall. Been doing great in the room, then I bumped up my humidity to about 60-62%; I had been keeping it at 50-53%. I bumped for other aroids in the room. So all of the sudden my fiddle started dropping leaves, very quickly, some yellowing and just leaf drop. What's going on!!! I can't figure it out, nothing else has changed in the room. Any suggestions? Thanks
So it’s likely that the plan isn’t used to those levels of humidity. So the old leaves have a certain number of stomata used to regulate based on the old humidity. Your new leaves that will come in at the new humidity will obviously have the stomata and the apparatus to deal with your new higher humidity.
Great video!
Have you already did a commentary of the movie, “Martian”?
More specifically, the scenes where Matt Damon is growing potatoes?
We would love to watch you science the sh*t out of it with some relevant math to help us understand.
Wondering if a very low VPD correlates to dampening off or if that's something completely different (like killer mold).
Also any recommendations for an accurate hygrometer?
Not at this moment but I have something in the works
Thank you!
could you use one of those thermal lazer pointers to read your plant leaves for vpd calculation? additionally, can you automate a heater mat in one of the cabinets with say a AC infinity product and a ventilation fan?
Yea, you can us the thermal lazers and yea a heat mat would work
I use humidifiers in my CBD grow tents. I keep the tents at about 50% RH when in veg state but I lower it to 30% +/- when they are in flower to avoid mold. I also closely monitor air circulation, PH, EC. I water according to the needs of the plants (I use a moisture meter) and I always add Aloe Powder or Yucca powder to the water to reduce any NPK salt build-ups and to make the water wetter and things like kelp and fish emulsions and a few other things besides fertilizer. Anyhow, just me bragging :)
PS: I also use a CO2 generator on a timer that works during hours the grow light is on. I find this to be very helpful.
So is the chart showing the “ambient VPD”? I bought a hygrometer that has VPD on it but I’m not sure what it’s measuring if VPD is based on the difference between the room VPD and the leaf surface VPD.
love the snoring at the end, lets just pretend it was the dog haha
More science please 💚
Glad you enjoyed
Hi, what are the signs for a houseplant indicating the moisture level in the air is way too low? Can it kill the plant? Thanks.
I actually did an entire video on this topic. ua-cam.com/video/hNJcm_G0gEA/v-deo.html
Holy Moly! Here I am fighting to keep my to keep my humidity above 30, but help me to make sure I am understanding this correctly! Daytime temp in our home is consistent at 21, so I need to keep my RH between 22% and 52%? Which it is, but at night our home temp drops to 16.5 so I need to keep humidity below 36? So rule of thumb is: higher the heat, higher the humidity? So, for a plant like my P. el choco that seems to need higher humidity, there's no point (maybe point is the wrong word, it's not optimum) without increasing the temp too? Am I simplifying this too much?
Yea exactly. You’re dead on! So if you know a plant prefers 60% humidity for example you should increase the heat of the plants environment to support that humidity actually being ambient
@@GardeningInCanada I think of all your vids this is the one that's going to change the way I grow my plants. I've had a seedling heat mat forever and just never knew why to use it. I seriously just added it under one of my prob boxes. You are the absolute best. THANK YOU!
That’s awesome I love when you guys apply the science!
That's pretty interesting. I'm well outside of that range however I only get direct southern light in the winter, due to large maple and oak trees in my backyard, which leaves my Christmas cactus very confused and refusing to flower. I bought a cheap hygrometer, which does appear to work, however when I run the ionizing humidifier, it doesn't register on the meter, even though you can see the vapour haze in the sunlight. Cooking and showering immediately registers. I think it must not be able to read the wet bulb temperature of the ionized water. Any thoughts?
Have you tried starving it for water. 😂 For whatever reason it seems to work
@@GardeningInCanada I do, but I still tend to over water. It started to bloom and had two flowers but then it saw the light as it were and shed the flowers. I might try switching out the plastic pot for a terracotta. That said, I have a poinsettia turning red in full sun. So who knows.
Yea!!! Terracotta! 110%
Wow, okay so I'm in the West where we battle black mould basically daily. It's very humid here & we use a dehumidifier. I'm happy when the ambient humidity is 70-72%. A 'simplified' ambient look at 72% - the chart says I need to raise the temperature to 30 + celsius, yikes that is so not going to happen! The solution then is to lower the humidity a minimum of 50%?? Am I getting it? And can I be successful with this simplified formula?? Sure would appreciate your time.
Yup! That’s correct. Your high humidity and low temperatures is what is causing your mould
@@GardeningInCanada Lol, oh yes I know that causes mould ;) But for indoor tropicals can I use the chart as 'ambient' RH - I think you said no? And if I keep it at 72% RH (which is comfortable to me) I need a 30 degree temp as ideal? Then if I want to keep the temp at 20, I actually need to lower my humidity to 50RH?? Wow, 50 really seems low to me - every vid I've watched for over 3 years is all about high, high, high & more higher humidity!! So, I though I had it made in the humidity lottery. This is a very interesting subject, much appreciated!
Is VPD expressed as kPa units?
Do you do house visits?
I have 😅
The reason nobody talks about it is that VPD = absolute humidity (AH), which everybody knows has been decided many decades ago was a less-relevant measure than relative humidity (RH). VPD is just putting absolute humidity on a different type of scale. It's like C & F both measure temperature, same thing on a different scale. Long ago it was decided that RH (AH combined with temp) gives us more overall info relative to the plant's needs than just AH (same as VPD), since both are measuring water vapor, but AH/VPD just lack the temperature factor. VPD sounds more "sciency". Almost all who use VPD trying to appear sciency, but ironically don't understand they are literally talking about absolute humidity, like in this video and in many recent published studies.
What about Hemp . I was taking CBD with very min THC . But I wanted to learn more about CB2 hemp. Hemp has a lot of good terpenes and other healing as CBD without THC but no one is talking about it ..WHAT and WHY ?
I'm just slightly surprised that you didn't mention cleaning the leaves, as that seems an important factor here. No leaf-shine, just water on a clean cloth to open up the leaves to proper respiration.
If looked into the literature of clogged stomata and there isn’t much to support its even a thing. But common sense would indicate that’s the case
@@GardeningInCanada I mostly just comment to boost your signal for the algorithm. You pick great topics, and make helpful vids.
Yesssss!!!!
Humidity: Not just to avoid crispy leaves
Why higher humidity may require more watering, not less.
These are the general ideas from a houseplant general nonnumbers POV
Yes exactly it also affects your growth
Woah…I bet a bunch of gardeners lost you on the first turn…my experience in New Orleans (a bit different from Canada maybe) anyway humidity is always high in my grow room…temperature is usually high also, the only thing that works for me is massive air flow and even air conditioning in the heat of summer. I have 2 16inch Hurricane Oscillating fans in a 12’X12’ area….anyway I think I agree with you that to get best growth you need a gradient across the plant, you want water leaving the leaves and water and nutrients being sucked up the roots…move some air past your green babies….
I am not to loose anyone in the video topics but I can understand why they are maybe boring to so many people
@@GardeningInCanada Certainly not boring…to me at least. I am a chemist and it really is not that tough of a calculation, however I find that when there is dirt under my fingernails my IQ slips by a few points…maybe(definitely) I just enjoy dumbing out while gardening.
you are a Sweet ❤
dogo's need mor attention :D
Always do!
So in a nutshell because I don’t really understand this…are you saying if my house is 72F then my humidity should be 72%
It is showing 65% - 70% for that temp
💚💚
❤️❤️
I have a headache
Uh oh!
I don't understand. :(
VPD = inverse RH. If you have a low VPD increase humidity, if it's high decrease humidity. This is just science complicating common sense. Most plant ppl commonly understand each species needs it's own amount of humidity and that varies by temperature. IRL, ppl almost always just refer to RH as humidity because there's no point in discussing absolute humidity outside of temperature in the real world. A suggestion to adjust your RH or VPD amounts to exactly the same thing.
@@calebbryant3226 Got it, thanks! 🙃 The chart is in my head now. It's second nature when I check my growing spaces.
Thanks for the video. This is a very interesting subject. I have a few words of constructive criticism for you to either use or discard, whichever you wish. The video is unnecessarily long. I would bet most people were interested by the title but stopped watching once they realized how long it is and how long it's going to take before you give them the info they want. I know it's hard to trim things down sometimes but this would be a lot easier to sit through if it were not as verbose. The audio has some issues that make it a bit frustrating to listen to. Because of the very slow pace, I sped up the video. This means I have to turn the volume up in order to keep it sounding clear. The dogs are super cute but the sound of them walking around gets picked up by the microphone and that became frustrating after a while. You also have a tendency to use vocal fry, which a lot of people find unpleasant or irritating. It's a fairly simple thing to correct and there are videos here on UA-cam that could help. Some content creators appreciate this kind of feedback because it lets them know what they can improve in order to be more appealing to a wider audience. Others get offended and take it as a personal attack. Please don't receive it that way because I really like you and think your channel is great. I'd like to see you keep going and keep building an audience.
“Unnecessarily long”. Well, the VIDEO wasn’t….