Sounds like an nitrogen deficiency.Fertilize with a nutrient high in nitrogen.Example ra-pid-gro 23-19-17,which means it has 23% nitrogen N,19% phophorus,& 17% potassium. N-P-K.The other thing is that i think ur ph level is to low i would say anything between 6.2-6.8 is just fine for marijuana to grow,and is the plant receving enough light is the top of the plant shading the lower leafs. anyway good luck.
mrxthethcman Reviewed by mrxthethcman on . nute lock up? hi ppl ive just got plain 6.0 ph water in my gro tank now because i had salty stuff on the rockwool and the bottoms of my stems and the leaves were rapidly turning yellow, but after two days of flushing they r still turning yellow,ne1 got ne advise on what i should do,the plants r about 4 weeks from seedlings. thx guys!!!!!!!!!! if bon bon is out there can u help please m8,u seem 2 know ur stuff or ne1 else who knows what they r talking about please help . :) Rating: 5