3 weeks since seedling on the lower level branches. Other leaves are slightly light green but doesnt show this. Growing in rockwool in a nft system . Ph is 5.8 temps are bout 19 - 24 under a 400 w light. Using Flairgrow 3,1,5 . ppm is about 700 .
Here is a pic wil post a better one later tonight and also take a look at the roots. It is only really happening to the older bottom leaves but throughout the rest of the plant the leaves are blotchy light green to dark green