Bottom Leaves Keep Dying

Hello I have a female plant that is about 4 feet tall and as it keeps growing taller all the leaves at the bottom keep turning yellow and then dies shortly after. Can anyone diagnose this problem PLEASE?

maybe with lots more info or a pic. right off i would guess nitrogen def, but thats without proper info.

Uh, pic please? Has it begun flowering? I'm not a pro (so if i'm wrong plz correct me) but I do know that during flowering the bottom (older) fan leaves turn yellow and fall off because most of the plant's energy is used to produce buds and it no longer needs the old leaves. So they turn yellow and fall off. Hopefully this helps somewhat. I'll let the more experienced take over from here.

blowin is right, when the plant ages the lower fan leaves do die off. Sometimes it could be nitrogen deficiency. Some pictures would be very handy.

yea it is flowering i will put up some pictures tomorrow