A vigorous old hardy-hybrid rhododendron carrying domed trusses of rosy-crimson flowers in spring above bold leathery leaves. Needs cool moist acid soil and dappled shade to thrive.
At a glance
- Plant type: Shrub
- Mature size: 3 m H × 2.5 m W
- Aspect: part shade or morning sun
- Water: regular, moderate watering
- Frost: hardy
- Maintenance: moderate maintenance
- Origin: Exotic
About Rhododendron Cynthia
Botanically, Rhododendron 'Cynthia' is a slow-growing shrub in the Ericaceae family. It reaches around 3 m tall and 2.5 m wide at maturity, with evergreen foliage. Pink and red flowers appear in spring.
Where to grow Rhododendron Cynthia
Rhododendron Cynthia suits cool-temperate climates and grows best in part shade or morning sun. It is frost hardy and shrugs off cold winters.
Soil & planting
Rhododendron Cynthia does best in acidic and free-draining soil. Dig in plenty of compost before planting, water in well, and mulch to keep roots cool.
Watering & feeding
Rhododendron Cynthia does best with regular, moderate watering. A light spring feed is usually enough to maintain steady growth. New plantings need closer moisture checks in hot or windy weather, with watering tapered once strong new growth appears.
Pruning & care
Prune Rhododendron Cynthia after flowering to keep it compact and encourage the next flush of blooms. Expect a moderate maintenance care workload once it is established.
Using Rhododendron Cynthia in the garden
Rhododendron Cynthia earns its place for a feature or specimen planting and pots and courtyard containers. It is equally at home in the ground or a large pot on a balcony or courtyard.
Companion planting & design
For easier irrigation and care, group Rhododendron Cynthia with species that also favour regular, moderate watering and cool-temperate climate. Leave enough room for the mature spread so neighbouring plants are not crowded out.
Good to know
Note that it is toxic to cats and dogs, so site it away from pets that chew. All parts can be toxic if eaten, so keep it away from small children.
Buying Rhododendron Cynthia
Plant Sale lists Rhododendron Cynthia as potted plants and advanced specimens. Catalogue forms are planning guidance until the Plant Sale team confirms live availability.
