Beginner Gardening: desert rose losing leaves, 0 by donnerville

donnerville wrote:
My desert rose bloomed beautifully earlier this summer, but it started to lose leaves about a month ago. The plant is on the south side of the house, getting full sun from morning to late afternoon. It looks sickly now, and has stopped blooming. The leaves turn yellow first and then fall off. At this rate, there won't be any leaves left. Can somebody tell me what is wrong with it? Many thanks!