Spike weeds (and rock) as the only attacker? [PvZ Challenge]

In one of Detara's challenge videos: • Can You Beat Survival ...
they mentioned "If you end up beating it with these rules...let me know in the comments". I took up the challenge and this was the result of 2 hours of planning and trying.
As always feedback is highly appreciated and if you are going to use this footage for any reason, then please put a link to this video.