These actually look like the normal yellowing I see in flower from about week 5 on, progressing until the end of flower....in some cases I have seen whole plants go bright yellow, species dependent.

Of course I am just looking at pictures. Root bound may well be a problem or in addition to the normal reduction of N in the leaves.
WashougalWonder Reviewed by WashougalWonder on . WHY R THESE YELLOWING!! strain is somango by soma seeds, only the jack herer pheno seems to be yellowing. the other pheno is nice and green, i have 2 of the jack pheno and both are doing the same thing day 30 of flower they will go 70 days, feeding with the advanced line, i go water, water, nute... just nuted the somangos with 5ml big bud, 4 ml bud candy, 1ml root zone, 3ml b52, 3ml nirvana, 5ml sensi a and b to each gallon of water then ph at 6.6 and ppms at 1000 ph is always between 6.4 to 6.9 pot size is 3 gal, Rating: 5