If you're an experienced grower, I WANNA TALK TO YOU!

it could be several things, but we'd need more info to tell for sure. What kind of light are you using? how often are you watering? how big is the grow space? If you're a begginer, my guess is you've made the most common mistake and not given it enough light. Also if by reynolds wrap you mean aluminum foil then you should get rid of that. aluminum foil doesn't reflect as well as you'd think. It creates hot spots and a flat white surface actual reflects a whole lot more light.

 

Yea I would say definitely overheating, aluminum foil is the worst possible reflective material to use since it reflects light unevenly and creates a lot of hot spots. If your on a budget white paint would be a much better choice. Also if the fan is on a high setting this could also be bad for the plant. But they will just get stronger from the wind breaking them down so it could also be a good thing. Everything in moderation. What kind of lamp are you using?

 

Hey sexypenguin we were on the same wavelength when we answered 1 minute apart on the foil issue. You must have just blazed as well.

 

Well if it is a plant light, how many lumens is it putting out and at what temperature(Kelvin rating). I am a new grower, but my grow is going quite well so far for me. I just put white computer paper on the walls in my box. I have a 15W T-5 CFL tube, but it puts out 1000Lumens at 6500Kelvin. Also, my original thought was that the fans were creating an air stream across the plant and knocked it over by constant force.

 

Aluminum foil isnt as bad as everyone makes it out to be... I've heard it works rather well if you use the more dull side. but take whatever info you want I suppose. I would say its probably from your fan though...

 

Skip the foil, and use some mylar if your on a budget. You can get mylar wrapping paper at any dollar store. Turn off your fans till its at least 4 -5 inches. Also get your lighting issue figured out. For vegging, you want a daylight bulb 6500k. CFL or florescent tube. Get those issues worked out and the rest is easy.

 

so you said you wanted to stay cheap. we kinda need to know what dimensions you want. i have been thinking about making a new one to put in the basement and ill tell you what ive been tossing around.
for a 4x4x6 ft box i was thinking of using luan, 2x4 boards, great stuff insulation in a can. that is the stuff to build it. and it goes like this

usually luan comes in 4'x8' sheets so you will need about 4 sheets if you use the ends of the 6' sections for top and bottom.
you can get 2x4's in many lengths so just do the math and get what you need.
assembly: build the walls on the ground to make it easy and i would use screws about 3" long. once you have three of the walls up, you can make a door by putting hinges on one side and leaving the last wall as your door. then once you got all that seal the cracks with the great stuff foam insulation. it really expands so you can be a little conservative with it. then i was going to use 4" dryer vent with a ventilation fan to suck air in and blow across my light then to a "Y" connector where i have another fan sucking it out. the other part of the Y stays open to suck hot air out of the box. then i have a fan blowing air in the box. sounds a little complicated but just post something back if you need any more instructions. good luck
sorry its long