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My PH is 6.8-7.0. I am using half strengh 10-10-10 fert. Temps are fine. These start out as brown spots on the bottom leaves and are progressing up to the upper leaves. I am also supplementing with Epsom. Should I flush and stop nuting or nute more? I also have purple stems if that helps. Please...

It's day 13 since my germinated seeds popped through the soil. From what I have seen from others' pics, mine are very small. For example, the round leaves that are supposed to fall off are still attached. I have them under a 2' 8 bulb T5 HO fluorescent fixture about 3" away (16,000 luments). The...