my grapefruit tree just started shedding its leaves a week ago and it seems every morning there are about 1- or more that shed over night. it is in a pot im pretty sure its too small but thats been a problem for a yr or so,. not a new issue. i water it every day and its in the same place it always is/ spending the winter indoors next to a morning sunny window. ( summer it goes outside in almost the same exact spot) i have posted before/ we are in nj so its a bit chilly there but why all of a sudden would it shed? is it normal? i see no parasites or bugs or cobwebs on the leaves. a few months ago i thought maybe white powder substance ( dry not sticky) so washed it off no problems since. maybe i am not watering it enough? or can this happen if you water too often? odd it started a week ago with no changes-in temp inside its not near a heat source its radiant heat in the floor but its near the front door so it does get a slight draft.... lots of branches without leaves now so any suggestions? but also have new branches with new leaves.. my husb said it usually sheds in the spring/ make room for the new life but never this much. help!!