Rose of Sharon, (Hibiscus syriacus.) is a great summer flower shrub hardy from zones 5 and higher. Although naturally a multi-stemmed shrub, rose of sharon can be trained through pruning (in late winter) to have simply one main trunk; thus some people refer to it as rose of sharon "tree." It's easiest to give rose of sharon its desired shape by pruning it accordingly during its first two seasons. It can also be trained for espalier. When pruning, use sharp pruners ...
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