GMSgrowsanswered grow question 4 years ago Darkness of the leaves makes me think its overfed. Creates lockout. Check your runoff ph and ec levels and if their out fix. Not sure what your growing in so you need to know the levels for your medium. Veg is soil is around 6.3 ph and for soiless 5.8 ph in flower soil is 6.3 ph for veg and 6.7 ph or so for flower. Cheers