Normal? or what

Sorry, I dont have any pictures right now, but I'll try to get some up later...

But...

my ladies are close to 4 weeks now in flowering... and a lot of the leaves are starting to turn yellow, and its throughout most of the plants, its not just at the bottom... is this normal or no??

what type of nutes you using how often you using them and what type of
lights you using how close are they, soil/hydro? yellowing happens to the big fan leaves. and pics if you can would be nice

Flora Nutes Set... 100w Hps, with 2 26w daytime cfls, about 5-7 inches away, in organic soil, not sure of the name... and the leaves are turning yellow and dying...

please help