prematurely dropping flower buds on Rose of Sharon
Bud drop in Rose of Sharon (Hibiscus syriacus) can be caused by insects like thrips and aphids. If a strong stream of water from the hose doesn't dislodge them, use an organic oil soap to get rid of these pests. Don't prune Hibiscus past early spring or you will be getting rid of the new blooms. Also, check that these shrubs are still growing under full-sun conditions (6-8 hours of direct sun light daily). If the foliage is too lush, branches maybe shading each other, too. If this is so, cut back on the fertilizer.
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