Answer: The hardy shrub hibiscus Hibiscus syriacus (Rose of sharon) will self seed nearby (unless it is one of the cultivars that does not set viable seed), in my opinion that is the easiest way to get seedlings. Otherwise you can collect the seed in the fall when it is fully mature and plant it in the garden where you would like a new shrub; in late spring/early summer look for seedlings to emerge. This plant is probably more often propagated by rooting tip cuttings. I hope this answers your question.
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