Two weeks is a really long time on a res, esp in early flower.
Doubly so @ 1/2 strength.

I've pushed the PBP way up over 2k through stretch- some loved it ( pp), some less happy (blueberry).

Takes a couple runs to get it dialed in- well advised to underfeed ( reduced yeild) rather than overfeed ( cataclysmic die-off)

I think yer seeing underfeed, but I would be double-checking my pH with at least one differant meter/test before I ruled it out. Meters ( esp cheap ones- not too imply that your's is) can lie.
rhizome Reviewed by rhizome 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