I used 600W HPS during Veg and now using 1200W hps (2x600)

They should be ready in around 3 weeks
FatBud Reviewed by FatBud on . Yellowing leaves Having put my three girls into 12/12 just around 2 weeks ago, I have noticed that quiet a few of the older and lower leaves are turning yellow, and the leaf stems are turning purple, is this simply a nitrogen deficiency perfaps due to build of salts in soil, or as a result of the plants chemistry changing, I know these lower older leaves act a N resevoirs so could it just be that the plant is redistributing its Nitrogen? Or could it be anything else? Perhaps this is normal!! Any comments would Rating: 5