Here are pics of my 2nd grow. The first was under 1000W MH veg. and bloom 5 1/2' plants. These were started under ProGro 400 and finishing under 1000W HPS conversion bulb. These plants are 7 weeks into bloom. 1 liter bottle for perspective. Yes i see the leaf curl on the Power Africa plant it is pure sativa and it seems much more sensitive to nitrogen.
