The garden hibiscus (Hibiscus syriacus) or althea shrub according to its former name, is related to the Chinese rose, which is kept as a houseplant. The plant is native to most of Asia. Hibiscus syriacus is the only species from this plant family that is sufficiently winter-hardy to be planted in the garden here.
Lord Baltimore' hardy hibiscus, swamp rose mallow - Vinland Valley Nursery
OnlinePlantCenter 3 Gal. Brilliant Tropical Hibiscus Flowering Shrub with Large Red Flowers H765G3 - The Home Depot
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Buy Head Over Heels Dream Hardy Hibiscus, FREE SHIPPING, Wilson Bros Gardens
Summerific® 'Edge of Night' - Rose Mallow - Hibiscus hybrid
Gardening: Cold-tolerant hardy hibiscus needs little care in winter