DJ - It looks like you have too much red in your stems. If you can, next time the lights go out, put a cfl or two in there and get some good shots of the upper leaves and stems with the cfl's and flash. (You can turn off the HPS five or ten minutes early to take the pics and then not screw up your light cycle... cuz I know you worry about little things like that.) It looks like you might have some kind of deficiency going on there.

PC :smokin:
PharmaCan Reviewed by PharmaCan on . Nitrogen Deficiency in Flower I am pretty sure I have a nitrogen deficiency. The bottom leaves are completely yellow. I am two weeks into flower and coincidentally I'm due for a res change tomorrow. Could this be why? My nutes are Botanicare Pure Blend Pro Fruit and Flower 2.5-2-5. Its only appearing in one or two plants as of right now. If its not just my plants signaling that its time for a res change, what's the best way to add nitrogen without hindering the flowering process? Rating: 5