Blue Angel™ Althea
Hibiscus syriacus 'Greba'
Masses of large, single blue flowers adorn this compact plant all summer through fall. Tolerates a variety of soil types and moisture conditions. Reaches 6 to 8 feet tall and 5 feet wide. Drought tolerant. Adds gorgeous color to landscapes.
Exposure:
Sun
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Height:
6-8 ft
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Spread:
5 ft
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USDA Zone:
5
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Key Features:
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Growth Rate:
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Habit:
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Flower Color:
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Blooms:
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Resists:
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Uses:
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For new plantings
1. Dig a hole one and a half times wider than the plant's container
2. Place plant in hole, keeping the top of the root ball ground level
3. Back fill with dirt
4. Water thoroughly and then mulch around the base to conserve moisture and reduce weeds
New plantings require more frequent watering than established plants. Wind, temperature and soil are factors to consider in watering.
Feed plants in early spring and again in early fall with an all-purpose fertilizer, following label instructions.
Care Instructions
Altheas require well-draining soil and full sun exposure to thrive. Water them deeply once a week or when the topsoil feels dry. Fertilize them in the spring using a slow-release fertilizer. Prune the plant in late winter or early spring to maintain its shape and promote better flower production. Altheas are generally hardy and disease-resistant, but keep an eye out for pests such as aphids, spider mites, and scale insects. Treat these with insecticidal soap or horticultural oil if necessary.