I use Fox Farm products and I'm growing four Cal Bud plants now. I use the chart dusto posted without any problems. Plants are still looking good, a bit burnt at the tips, but nothing serious. This is my second grow and chances are you won't get centerfold quality plants, as far as looks go, but your herb won't be affected by any unsightly leaf discoloration. So as long as you don't kill them, you'll be fine.