Shouldn't this thread be in the plant problems area?

Are the plants in flower stage? It is perfectly normal if so. Fan leaves yellow, brown, and even die in the flower stage. Nothing you can do about that.

Otherwise, be sure to check the plant problem chart here:
114 Photos of Mineral Deficiencies in Plants (~ 1 meg) for Visual Diagnosis

and here:
Grow Marijuana FAQ, Cannabis cultivation - marijuana growing tips & photos A must for all weed farmers! Copy this to your computer!

Hope that helps a little.
Opie Yutts Reviewed by Opie Yutts on . sick plant need advice Ok now i am concerned one of the plants is definetly unwell, its leaves are turning yellow and dying. I read up a little and thought it might be nitrogen def so i got some Arthur Bowers Fish Blood and Bone i started to use it around 3 days ago but it doesnt seem to be working. The other plant is fine which is unusual as they are kept in the same conditions fed and watered the same at the same time with the same products can anyone help me out heres a few pics Rating: 5