Most likely it's just because the light isn't getting to it and it's dying.Totally normal.
Is the plant getting ready to flower and thickening up?
J DOG 6000 Reviewed by J DOG 6000 on . Advice about leaf colour My plant's been doin quite well but 3 or 4 of the lower fan leaves are very pale green. I thought it might be cos i wasn't feadin it enough so i started to give it a bit more food but that hasn't helped. If anyone knows what could cause this i'd love to know or if anyone knows if the feed i'm using will work ok. Rating: 5