I must have had some setting wrong on my camera or something. Here are some pics.

Also, how often should I be changing my res? I thought 2 weeks was about average.

Also, my pH meter actually is the cheapo Hanna Champ, and I have calibrated it so many times that I can no longer "turn it down" to get it to read 7.0 solution. I have to see what it reads the 7.0 solution at daily and then subtract from the res reading accordingly. I also double check it with a liquid kit once a day and its always been accurate.

In the first pic is the deficient plant (farthest right), second pic is the three plants on the other side (I think the flash was on), third pic is a fat nasty bud-to-be. :jointsmile:
dejayou30 Reviewed by dejayou30 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