I have 3 Gardenia plants of different sizes and the biggest seems to have lost half of its leaves, leaving many mostly bare branches (have 1 or 2 small leaves at ends). Last summer I had a lot of trouble with white flies and used a solution of dish detergent and hot pepper sauce to get rid of the flies. It seemed to work well, but now all my plants are losing leaves in varying amounts. The biggest plant is about half bare, and the bare branches have whitish/grayish spots on them. I'm afraid I'm losing these plants. Can you help? PS: I live in the Myrtle Beach, SC area.