How To Control Humidity When Growing Indoors
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- Опубліковано 22 лип 2024
- It’s important to to control humidity in any growing environment as it impacts the quality of crops, the growth of crops, and diseases in the farm. (Read the article here: university.upstartfarmers.com...)
Different crops prefer different humidities, but optimal humidity usually runs from 60-85% for different crops. (But be sure to look it up for your crops specifically!)
Too little humidity, and plants don’t get the inputs that they need for growth and metabolism. In this case, you might need to humidity your space.
This is rare for most growers, although here in arid Wyoming, we do have a humidifier in our farm. We use a fairly large industrial indoor humidifier for every 500 square feet. Sizing a humidifier can be tricky, since it depends on crop type, transpiration, heat, evaporation, and more factors. There are some calculators related to this in Able.ag.
Usually, growers won’t have to bother with humidifying a growing space, because plants function as little humidifiers themselves. Plants release water vapor through transpiration, a key part of their metabolism. This means that TOO MUCH humidity is a much more frequent problem.
Too much humidity can cause disease and fungal pathogens. In this case, you need to know how to dehumidify. There are several options here:
1. If you’re in an arid climate, then air exchange might to the trick to control humidity.
2. Air conditioning dehumidifies by condensation.
3. Dehumidifiers are available for both commercial and hobby applications.
Often, growers need to cool a greenhouse as well. In this case, choose a method that makes dehumidification easier. For growers trying to cool their greenhouse using a cooling wall are adding humidity to the air. They aren’t very effective in humid areas.
Sizing a DEhumidifier is also tricky. We recommend getting in touch with us to figure this out.
Remember that humidity is tied to temperature. As temperature goes up, its ability to hold water increases also, and that usually means that warmer air is more humid. Sometimes, growers can manage humidity be lowering the temperature of their growing environment.
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Timestamps / What’s Covered:
00:17 - Effects of Poor Humidity Management
00:45 - Optimal Humidity Levels
01:20 - How to Dehumidify
01:43 - Cooling Walls & Swamp Coolers
02:16 - Dehumidifiers
03:41 - Sizing a Dehumidifier
04:09 - Why You Don't Need to Humidify
05:03 - Environmental Controls & How They Relate
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Scott Gratton
freemusicarchive.org/music/Sco... - Наука та технологія
Great info thank you!! Would you know where I can get a really precise temp & humidity meter. I have a few but they all read a different reading. Thank again✌🌴🌞
thank you for sharing. I have a quick question, I am planing to make my first indoor seedling in my basement. Temperature in there around 60-65 F . I placed my seedling trays on seedling heat mat and on top of them I installed LED light). Do I need to cover my seedling trays ( with some film to increase humidity around my seedlings? Could you please suggest some book, link, information ? Thank you again for kind sharing. best wishes
Beautiful and amazing. Great share. Thanks.
This video helped me a lot. Thank you!
Perfect! Been growing in my conservatory (and outside) and we’ve been having 90+ humidity days in the uk recently. I’m gonna try these small Crystal dehumidifiers before trying our bigger electric one
Howd ya go
What kind of dehumidifier fo you recommend for a 4×4×6.5" grow tent?
Hey I’m just starting to grow inside in a 4 x 10 10 and that’s what I have my flower plants and I am growing in the Maine It gets pretty cold here at night right now so in my tent when I woke up this morning the humidity said 87 and attempt to save 59 so my lease had water all over them what can I do to help so I don’t get mold thanks
i have just set up a small 200sqft indoor farm. how to check the humidity and type of humidifier needeD?
Hello Bright Agritwch team,
Can you help me size the appropriate size of dehumidifier for my system?
I am thinking of building an indoor stacked type aquaponics in small facility sizing 3*3m=9m2 area. The Dwc system would have 400 heads of lettuce growing with 800 horizontal rectangular shaped fish tank. Also it has bug window facing south. In winter the room temp drops down to 18 degrees celsius inside facility while outside is -35 to 40 degres celsius at coldest. Now the indoor temp is fluctuating between 22 to 28 degrees during the day and night times.
Thank you.
This channels vid's are so informative. I thank u guys/girls :)
Awesome, glad to hear it!
What a lesson on rh and temps nice1 growmie 🏴💯
I have a 500sqft grow area. What type of industrial dehumidifier should I use? There are so many.
18L covering 2,000 sqft for $340
138 l/d for $3,700
106L for $4,000
33L covering 4,500 sqft for $500
What numbers should I be aiming for?
Looking For some help please...
I just have two plants (3 weeks old) in a 3x3x6 grow tent with only an exhaust fan (190 cfm). Multiple floor fans, small room dehumidifier that pulls 16 oz for every 24 hours. LED lights (600watts) Weather in this area jumps around. Some days really humid, others really dry. Usually the humidity stays within 50-68%, but lately it's been very humid outside, and my tent won't get any lower than 70%.... any suggestions on how to help the humidity stay at a solid 50-55%?
is there any sort of automated dehumidifiers for grow tents? and tempretures i have a greenhouse heater on a controller but dosent work that well temp drops to much at night please help
Yes, there are some great, dehumidifiers out there. We use some Active Air ones we like.
Insulate your tent.
Real helpful! Thanks
What about Glycol water chillers ?
Can I use a Vic’s humidifier for my small two plant cannibas grow tent to increase humidity
Yes, they work fine but you will want to plug it into a humidity controller and disable the built in night light, I have an older version that doesn't have the night light. A humidity controller like a WillHi WH1436H runs $35.99 on Amazon.
When you turn on Lights you turn on heating , and when temperature goes up humidity goes down , or relative humidity .I guess big grows might behave differently but small ones in my experience have lower humidity with lights on .
Agree,, Small grow here in a Basement of all Cement walls, Light comes on, Humidty goes Way down.. We have to Keep a Cool Mist running when the light is on, and turn it off when the light goes off,, Seems to be working ok..
@@scotoverstreet3113 yeah , cool mist i used those hot mist humidifiers , destroyed my plants , they dont like that , cool mist
But even that can not be allowed just to run , one must clean and keep it tidy to avoid bacteria , fungi and stuff
and then all shell be very nice indeed .
We have 15 to 16 plants and 2 grow tents and I'm having trouble with the humidity. It won't go down past. 70 and I have1 big dehumidifier and 2 small ones that we stopped using. What do we do we just started the flowering process a week ago
Hi Nathan, there are a few ways of tackling a problem with higher relative humidity in your grow tent:
1. Try installing a small fan for better air circulation within your tent space.
2. Try reducing the amount of plants within your growing space. When plants are actively consuming light, water, and nutrients, they go through a process called “evapotranspiration”. Evapotranspiration is the process in which your plants release water molecules from the underside of their leaves called “stomata”. Depending on the crop, proper spacing can dramatically reduce the amount of humidity build-up in a growing space (and reduce the chances of fungal outbreaks from occurring)!
I have two humidifiers going here in the driest state, Nevada.
same in dry winter canada. very low humidity
Thank you…
im opposite, my 8x8 tent i have small plants ,and soon as light comes on bang my 4 led lights dry up everything im at 23% humidity,,i have 5 containers full of water around tent,and i have a humidifier,and still sitting at 23% with lights on,with off,,i get 57%,with humidifier going,and air filter on low
Yea same here. Drops from 55-25% in about an hour after the lights flip on
Where do you guys live, dry ambient place no doubt
@@Soilfoodwebwarrior nah New England. Low humidity here is about 50% but I got a decently powered quantum board in a 4x2x5 tent. Bakes out all the RH
@@KalFx3 I got the same set up and same problem, just different location up in Michigan's U.P., less than a mile away from lake Superior
@@morebakeder pain in the ass but all I did was throw a drip tray in there filled with distilled water and a little cotton towel folded so it looks like a big candle wick sticking up. Gets it up to about 37-40% RH and everything been doing fine. Just wash the towel every week or so
im having a problem with my humidity in my green house. it runs fine during the day but when I put the blackout tarp on my humidity spikes like crazy but 30% how can I control that? cause my green house has to stay dark and if I life a corner or something it does nothing. it still stays at 90 to 92%. PLZ HELP!
you need dehumidifiers or heat or breathable wall from foreverflowering.com with a fan. read my comment about humidity above.
Having same problems
That was a super informative video thank you for making that , I learned a bunch. Although I don't know exactly what size Dehumidifier I need at least I have an idea how to start calculating size Maybe you can help. 15 square feet being exhausted plant uses one gallon per 3 days the internal temperatures 81 external temp is 69. RH wants to stick around 60 lights on/70 Plus off. I need to be around 50 preferably 45 even with the exhaust I can only get it down to 56RH.
Glad you enjoyed it! In answer to your question, you may need to look at a dehumidifier, an exhaust fan is only going to reduce the humidity to the level of the air outside the room, because this is what is replacing the humid air that is exhausted. Depending on where you live, a Quest dehumidifier may be the right option or next step.
@@ZipGrowInc I have a small 2.6 Oz dehumidifier in my 2, 3 ,5... and even with the exhaust generally hovers around 50/55... the dehumidifier is working cuz I can see it filling up with water every few days but I can't get it to go to 40 RH
If you guys still are on this channel I’m having a major issue with humidity and could use some help willing to pay for a phone call?
Hey I have a humidity of 45% an temp of 25 degrees would I have to raise the temp before I think about raising relative humidity an is it true that plants thrive in the 60 to 70 range??
70-85 f is where they thrive. Ya you need to get your temp up first step
5:20 Wrong. You want to raise T when dealing with high RH. Temp and RH have an inverse relationship. Warming the air creates more volume of air space to hold the same amount of water vapor which equates to a lower percentage of water molecules in that given air space.
Higher T, Lower RH.
Lower T, Higher RH.
Thank you for pointing that out @z Hawkins. You are correct. Nate said that backwards. Given a set amount of vapor in the air a higher temperature will equate to a lower RH than a low temperature will. Thus raising (and not lowering) temperature will bring RH down.
how temperature is proportional to humidity man ??
Heat makes humidity
Did he just say at the end that the air can hold more water vapour at a higher temp, and in the next breath say to lower the temp to deal with high humidity?
Yeah, if humidity is high you don't want to lower the temperature because the water vapour will condense on the plants. I think he meant to say raise the temperature. He said it with such confidence I had to watch it more than once to think about what he was saying.
he meant to say raise the temperature, that will lower RH
I concur
Yup for sure. He mispoke
Insulating your tent will lower your RH & increase temps. Problem fixed!
Where are those calculatores? Able? Able dot Egg? Damn, somebody help me plz!
How can I increase humidity?
Don't humidify. If it's still really low in your growing environment, the easiest thing is to wait until your crops are larger and more mature- most growing environments will become very humid once the plants are rocking and rolling. You'll find yourself fighting to bring it down more than you want to bring it up.
@@ZipGrowInc what if I have only one plant in a fairly open space and would like to see higher relative humidity levels?
It really depends where you live and the humidity there.
a mollier h, x Diagramm is usefull
You're right- it can be super useful. We should have overlayed one and explained it.
Was literally waiting for the part where you tell us what humidity control to buy, which ones are good/bad, the best way to set it up in the grow tent, what levels of RH should the garden have from seed to harvest, what humidifier do you fucking use, etc, You know, like a real "How to" video. So troll omg..... Change your title please, it's very misleading, click bait I would say. This is not a "How to" video.
SKINNY MARKIPLIER!
You are not correct. You are giving wrong information