In several states rose of Sharon or altheas (Hibiscus syriacus) are classified as exotic (non-native) invasive shrubs (USDA hardiness zones 5-8). Their seedlings are invading U.S. woodlands. Plant breeders are now developing less invasive cultivars. The double-flowered altheas produce far fewer fertile seeds; stamens and pollen sacs are mostly embedded within the flower petals. Azurri Blue Satin® is […]
Archive for April 12th, 2015
Less Invasive Rose Of Sharons (Altheas)
Posted by Hugh on April 12th, 2015
Posted in acidic soil, alkaline soil, Butterflies, compact tree, container shrub, Deer resistant, Disease resistant, Drought tolerant, Hibiscus syriacus, Hummingbird, Invasive species, Pruning, Purchasing Plants, Southern Appalachian Region, Summer flowering, Summer heat tolerant, Trees & Shrubs, winter hardiness 
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