I live in the florida panhandle and some of my knock-outs are droping leaves. Not all of them, one might look good and the plant next to it looks thin why? They get the same water, fert., full sun, ETC. They are in the ground about 3 years and seem to do this same time every year. Other knock-outs in the area are looking good. NEED SOME INFO. THANK YOU ALL.
