Lower Fan leaves yellowing N def?

[bushdktr]

Hi guys, got this Critical Auto from Royal Queen seeds, day 55, on a peat based soil, organic grow, under 2 135W LEDs and 2 105W CFLs, sharing the tent with another plant, a 46 day Fraggle Skunk.

Both plants on same regimen, 36 hs brewed compost tea of my own, recovered rain water.

Overall both plants are doing great, but this one has lower fan leaves yellowing:

Close up of the most affected one:

Upper parts look fine:

And her neighbour also!

Both plants exact same soil, pH in both is 6.10-20, maybe a N def and Critical strain being more sensitive? Also noticed some clawing

What do tou think?

Thanks for taking the time

 

[Renaissance Redneck]

Both plants exact same soil, pH in both is 6.10-20, maybe a N def and Critical strain being more sensitive? Also noticed some clawing
What do tou think?

Bushdktr, you have some beautiful gals there!
I see nothing to worry about, judging by the pics. Older, lower fans will yellow and drop, just the circle of life At 55 days, N becomes much less important, P and K become king. By the deep green color, the slight clawing (sometime that can be genetic) and minor tip burn, I'd say you have given these gals plenty of N.
Watch your pH levels, make sure your P and K are up, and keep an eye on temps in your room. It looks like some of your margins are curling up a bit?

 

[bushdktr]

Yeah...thought so, thanks RR! Always nice to hear some reassuring concepts. Soil pH is 6.1-6.2 but temps are sometimes near 30-31 C (springtime here), so I need to keep an eye on that.