Red Heart Althea Tree
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Description
Hibiscus syriacus 'Red Heart' grows between 5 and 8 feet tall with a spread of about 6 feet. The Red Heart Althea tree has enormous, trumpet-like, white flowers with a ruby red eye in the center that will last all summer long. It adapts to most soil types and prefers full sun.
Characteristics
| Hardiness Zone Range | 5 - 10 |
Zones
Shaded areas show where this product grows.
USDA Hardiness Zones
A hardiness zone is a geographic area defined by average annual minimum winter temperatures, helping gardeners determine which plants can survive in their region. Developed by the USDA, the 13 numerical zones indicate cold hardiness—for example, a plant "hardy to zone 10" tolerates minimum temperatures of 30 to 40 °F (−1.1 to 4.4 °C).
Grows in zones: 5 - 10
This product grows in your zone!
A hardiness zone is a geographic area defined by average annual minimum winter temperatures, helping gardeners determine which plants can survive in their region. Developed by the USDA, the 13 numerical zones indicate cold hardiness—for example, a plant "hardy to zone 10" tolerates minimum temperatures of 30 to 40 °F (−1.1 to 4.4 °C).
