I've had my Purple Urkel mother vegging from about 2-3 months now, Recently I have noticed some of the leafs are blacking around the edge of the leafs and shriveling up and dying. This is happening on more lower leafs than upper but its throughout the plant, Id say around 10-20% of the leafs are doing this. This is an all organic grow I used blood meal, bone meal, EWC, Espoma plant tone, kelp meal, and rock phosphate. Shes getting PH'ed water that I let chlorine evaporate for a day or 2. Currently under 3-50 watt CFL's on 18-6 not sure whats going on here. I also use super soil, the only thing I have top dressed is the kelp meal and EWC. If I have left anything to help solve my problem out, let me know please and thank you!