Like GK said, temps may be playing a part, and def the nutes. Most nutes have about a 1 year shelf life and after that they under go changes that do things like what you are experiencing right now.
If your lights are not MH they will cause your lights to stretch durring the veg period and also, you want to get those 600w lights about 1FT away from the plants if heat permits. At 2FT away you can lose up to 20% of light penatration if not more. Closer than 12 inches you can lose out on your lights foot print and bleach the top coalas. I keep my 1K Hortilux about 10 to 12 inches away and with my 400W I have it about 6 to 8 inches away.
Good luck.
Adieu
BlueBear Reviewed by BlueBear on . Should i just stick to buying it?? Hi guys and girls. Hope i can pick at your wealth of experience here. I got problems and its my first grow. i have researched a lot and i have searched much around here but my findings are inconclusive so i ask; Take a looksie at 'hollys baby'. her leaves are curled up. then look at 'hermione'. her leaf looks a little burnt. am i correct that these two problems go hand in hand and that they are over-nuting? i am growing white widow, plants are generally about 250mm(10 inch to you old Rating: 5