I should have posted here first.
AK47 photos 14 weeks into grow noticed yellowing on only one of the girls, you can see my journal on here,
Thought it was nute burn so I flush the system and filled with filtered water but still yellowing continues.
Some of the coloring is normal at this stage.
What is this? She looks hungry, especially for nitrogen. Do you know your pH and PPM?
The purple coloring is pheno expression and looking nice. The droopy leaves are concerning, what do the roots look like and what’s the res temps 
Heavy 16 is the brand of nutrients I use. Its almost fool proof. Same everything as the other AK right next to her. They get fresh nutes and water
Every other week with replense in between. Roots look healthy
PH runs around 6.4./6.6. I
Sorry ppm not used with this nute.
ML per gal is what used per instructions
PPM is relevant and should be monitored and managed regardless of what nutrient product is used. Your PPM target should be ~1,000.
Suggest lowering your pH. A pH that is too high creates issues with potassium, phosphorous, calcium, manganese, iron, and boron uptake by the plant. Suggest a pH target of 5.8.
I suspect your issue may be related to pH being too high.
Im with midwest lower the ph. Coco/ hydro needs to be 5.8
Yes I agree with Midwest. Ph seems a little high. I’m a hydro guy myself . In hydro you want to maintain a 5.8 ph is the sweet spot . I had same issue with a plant . The ph was 6.7 somehow so did I bucket change with fresh nutes and ph5.8 and kept eye on the ph plant turned out fine then. Monitoring ph , ppm , par, temp, and rh is all key to a successful harvest. Your plants looking good though
New at this, just going off Heavy 16’ s instructions. I will start to monitor both ways. Lots to learn at this point.
Thanks for the help
Thanks, flushing system with filtered water for a couple days then I can start over.
Is that runoff numbers, Midwest?
Ok, just did everything possible. Completely flushed and drained buckets. Mixed new batch of nutes measuring ppm and ph. Now filled with new nutes
PH 5.4- 5.9-6.1 my meter jumps between those numbers.
PPM 972. Same meter so accuracy eh…
I will keep an eye on them and give update.
Again thanks for all the help on here, y’all are awesome…
There’s nothing more you can do just be happy that the plants will make it to harvest. Sometimes things like this are genetics
Its been a couple days plants still look distressed but showing signs of bud growth with new hair and green.
Looks good from here.
