About
Hibiscus syriacus 'Admiral Dewey' is a medium-sized, upright deciduous shrub that can grow up to 2 meters in height. It features three-lobed, medium green foliage. In late summer and early autumn, this plant produces double flowers that are pure white.
About the genus
Hibiscus comprises a variety of growth forms, including deciduous or evergreen shrubs, trees, annuals, and perennials. The foliage can be simple or palmately lobed, and the plants produce large, funnel-shaped blooms that last throughout an extended flowering period.
Growing conditions
- Sunlight
- Full sun
- Soil type
- Chalk, Clay, Loam, Sand
- Soil pH
- Acid, Neutral
- Soil moisture
- Moist but well-drained, Well-drained
- Aspect
- West-facing, South-facing
- Exposure
- Sheltered
- UK hardiness
- H5
Plant details
- Plant type
- Shrubs
- Habit
- Bushy
- Foliage
- Deciduous
- Height
- 1.5-2.5 metres
- Spread
- 1-1.5 metres
- Time to full height
- 10-20 years
- Suggested uses
- Cottage and informal garden, City and courtyard gardens, Coastal
Care notes
- Cultivation
- Grow in a moist but well-drained soil in a sheltered position in full sun
- Pruning
- Pruning group 1
- Propagation
- Propagate by semi-hardwood cuttings
- Pest resistance
- May be susceptible to aphids, scale insects, mealybugs and glasshouse whitefly when grown under glass
- Disease resistance
- May be susceptible to honey fungus (rarely) and powdery mildews