Answer: This is a bit unusual as hardy hibiscus (Shrub Althea) is normally a very reliable bloomer. You might try cutting open a few buds to see if there is an insect infestation of some sort, or any evidence of fungal infection. Finally, you might consult with your County Extension (513-887-3722) to see if there are other plants in your area exhibiting the same problem and/or if they can diagnose it for you and suggest any remedies. I'm sorry I can't be more helpful.
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