I would think it is just the normal necrosis that takes place in flower towards the end when the plant is using up the stored nitrogen from the fan leaves to boost production before harvest. It is usually a good sign. With the new growth I would think about a two part harvest, meaning I would harvest the more mature stuff soon and then drop the light and let it go for another week or two.
Adieu
BlueBear Reviewed by BlueBear on . yellow leaves leaves turning yellow i have flushed plant and the ph levls are good 5.9 temp is ok 75 degrees during day and 65 at night. can anyone think of anything else?:confused: Rating: 5