Quote Originally Posted by w33dman27
You need fert! Those plants have used up thier nitrogen much too fast.... I've never seen plants with about 80 % of leaves yellow I use the same fert, and sometimes I accidentally double the dose, and it makes no real difference. The bottom fan leaves should start yellowing a dying week 1, and by week 2 the middled-level fan leaves should start to yellow. By week 3 most of the old fan leaves should be dead, and the 'new' (no no the bud leaves) fan leaves should still be green and healthy. Most all fan leaves are dead by week 5-6, and then its getting close to peak, and now the bud leaves will slowly sart to die, in the prime weeks. Light green coloured leaves are a sign that the plants are low on nitrogen. Give a good 1-2 litre flush, then water 1/2 strength, and next water dont be afraid to add a full dose.

Buds are looking sweet, and I hope I helped you out!
W.M
you need nitrogen ASAP and a lot of it.

I feed my plants with every two days. and if they yellow like this i often give them a shot of fish emulsion (only early in flower)

I disagree with above in that i dont believe and dont find that most fan leaves are dead by week 5-6. it may be your strain. but ushually only 40-50% ever die off.

you may want to up your nute. strength and feed more often for a week, color should come back in the leaves. but may not