Hibiscus sinosyriacus

Hibiscus sinosyriacus is a deciduous shrub in the mallow family, Malvaceae. It comes from southeastern China, with its range reaching Guizhou. Records also place it in Guangxi, Hunan, and Jiangxi. It grows in valley scrub in a temperate climate. Its recorded habitat lies at 1,640–3,280 feet [500–1,000 metres] above sea level. Rose of Sharon is one common name used for it.

In gardens, it reaches about 10 feet [3 metres] tall. Its spread reaches about 6.6 feet [2 metres]. It grows at a moderate rate and sheds its leaves. Flowers appear in September, and seeds ripen in October. Each flower has both male and female organs. Insects pollinate the blooms, and the plant is self-fertile. Its late flowers give it a place in autumn gardens. The species also draws wildlife, though the evidence names no groups.

Choose a sheltered site with plenty of direct sun. The plant grows best with cool, moist soil around its roots. Its upper growth benefits from warmth and sun. Rich soil with ample humus suits it well. It also grows in soils of moderate quality. Sand, loam, and clay can all support it. Good drainage matters, since it dislikes poorly drained ground. It accepts mildly acid, neutral, and mildly alkaline soils. Light shade is listed as possible, but sun remains the preferred choice.

Plants For A Future lists USDA zones 6–9 for this species. It also reports tolerance of cold near 5°F [−15°C]. Yet late blooms can suffer when autumn frosts arrive. Milder sites therefore offer better conditions for its flowering season. Young plants in colder areas need protection through their first winters. Suggested garden uses include hedges and sunny woodland edges. These sites should still provide the sun and drainage it needs.

Seed, cuttings, and layering offer ways to raise new plants. Sow seed under glass in early spring. Grow seedlings under glass through their first year. Set them outside in late spring or early summer. Take half-ripe cuttings in July or August under cover. Mature wood cuttings can follow in early autumn. Layering is another option from midsummer into early autumn. The source lists no known hazards, but this does not establish safety. Its detailed food and medicinal claims concern a related species. They do not confirm edible parts or medicinal uses for this plant.