its ok smoke the plant is only using up its own Nitro , all plants yellow during flowering , its what u want then to do . one thing i would say is to add more perlite to ur soil mix , marijuana needs good drainage , try a 50/50 mix the next time . getting back to the yellow leaves , ur plant doesn't need as much N during flowering as it uses this to make leaves and stem ( not flowers ) it still needs sum all the same and if it can't get it from the soil its will take it from itself . in the last 2 weeks of flowering i will be using GH ripen and its has next to no N at all . u want all or fans leaves to yellow before u harvest.
ps the bottome leaves are yellowing 1st cuz the top of ur plant needs the N
I hope this helps
SH
Shallow Hal Reviewed by Shallow Hal on . yellowing leaves durring flowering??? i started 3 plants on 4-1 two from clones i aquired from buddys and one seed all were started in oasis cubes and then i moved them into a 80% super soil 20% perilite mixture in one gal nursery pots and then vegged at 18/6 light cycle under cfl lights and given no nutes for three and a half weeks then they were given some 1/2 diluted plant food 24-8-16 twice when they were 12-15 inches i changed the lights to 12/12 to flower they have been flowering for about 2 1/2 weeks and comeing along Rating: 5