well, I'd say its probably a ph or water problem. Looks good for the lumen output your light emits, for two weeks. Check the ph, make sure your using distilled water.
Also are you using alumminum foil?
that might cause problems as well, because it produces heat once the light is reflected, get some mylar.
Hope that helped
Skateboardingpunk420 Reviewed by Skateboardingpunk420 on . first time grow - leaf problem hi, this is my first grow, that baby is about 2 weeks old. The first set of leaves started to become yellow about a week ago, but I didn't bother too much because they will fell off anyway, but the first true lieaves had started to yellow at the edges. I moved away the lamp(1500 lumen CF cool white) a little bit and the second set was not yellowing anymore . but now the first set has become brown and the second one is becomeing brown too at the edges. why is this happening ? maybe I should Rating: 5