Wow! I'm actually growing green crack as well, I live in Southern Cali. I am using two 4by4 trays with a thousand over each one. My irrigation system is ebb and flow and I am using a coco mix and coco pots. I'm in week four of flower and things seem to be going strong. I am only doing 6 in each tray, but I super cropped them and also vegged for four weeks, two under HID. I do have a couple of concerns I thought you might be able to help me with though...
- I've noticed coloring on some of the hairs and was and I am only in week four of flowering. I am thinking that this may be from heat burn, however the coloring hairs aren't concentrated directly around or under the lights. I am using 1000w lights and venting them directly inline with a can fan, but I think I vegged a bit too long ad they are a strong sativa. Did you notice this by any chance?
- I also noticed a fair amount of leaf die off towards the bottom of the plant. My hope is that it is because I have created such a thick canopy from prolonged vegging, but I noticed in your pics that your leaves seem to be green all throughout the plant. Do you agree that it is a lack of light or do you think there could be other issues?