Rose of Sharon problem
Rose of Sharon flowers wilt shortly after blooming, we have a lot of buds but all flower\'s wilt within a couple of day\'s. We had a very WET May and now temp\'s in the 90\'s. Last yr flowers were plentiful and had no problem. I cut back some this winter, leave\'s look ok had some Japanese Beatle start on leaves but sprayed with Permethrin and they are gone?
Certified GKH Gardening Expert
You could try a fertilizer high in phosphorus( the P in NPK). This article may help as hibiscus is the perennial version of Rose of Sharon