another question

Hey riu long time reader wit a question on one of my main ladies the bottom fan leaves are falling off e'er no pics but I've explained it pretty well thanks for all replies

Im no pro but if your plants are in flowering that happens a little anyways. If your not in flowering how far along are your plants and how often do you water , are you checking your ph and adding fertilizers. Also what kind of light are you using or are they outdoors, many variables could be causing your problem pics would be nice or at least a more detailed description.