Catawba rosebay
Rhododendron catawbiense · Ericaceae
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⚠️ Feuilles contiennent grayanotoxine ; chiens, chats et enfants risquent troubles cardiaques et digestifs graves par ingestion.
The gardener's calendar
In autumn, ease off feeding and take the chance to clean up around catawba rosebay and prepare for winter.
ID card
- Foliage
- Evergreen
- Blooming
- May to June, rose-mauve flowers
- Adult size
- Up to 3 m in height
- Growth
- Moderate
- Hardiness
- Very hardy (down to -25 °C)
- Origin
- Mountains of southeastern United States
- Family
- Ericaceae
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability high.
Expert tips
The key tip
Rhododendron catawbiense needs acidic, fresh soil rich in organic matter, with no waterlogging. Remove spent flowers without damaging the buds just below.
The common mistake
Planting in neutral-alkaline soil where it yellows, or neglecting annual mulching which maintains acidity and moisture.
The pro's trick
If you notice leaves rolled tightly lengthwise in hot weather, it's not serious stress: it's its strategy to limit evaporation, it'll bounce back after rain.
Care
Watering
Catawba rhododendron appreciates consistent soil moisture, especially during growth and blooming periods. Water regularly during dry spells, preferring rainwater or non-limey water. Make sure not to let the soil dry out completely, but avoid waterlogging.
Light Exposure
Place this plant in partial shade or dappled shade, protected from the hot afternoon sun. It tolerates slightly more sun exposure in cool, humid climates. A location sheltered from drying winds is preferable.
Soil
Catawba rhododendron requires acidic, organic-rich, and well-draining soil. Improve the soil at planting with ericaceous soil and compost. A pH between 4.5 and 6 is ideal for this species.
Pruning and Cleaning
Remove spent flowers after blooming to encourage better flowering the following year. Prune lightly in late winter to maintain a compact shape and remove dead or damaged branches. Avoid severe pruning.
Fertilizing
Apply a fertilizer formulated for ericaceous plants in spring, before or at the start of blooming. Follow recommended dosages and favor balanced formulas. A second application in June can support blooming.
Diseases and Pests
Watch out for spider mites in dry climates and vine weevils that nibble leaves. Powdery mildew and root rot can appear if humidity is excessive or soil is poorly drained. Ensure good air circulation and maintain balanced soil moisture.
Did you know?
Catawba rhododendron originates from the mountain ranges of southeastern America and is named after the Catawba River (meaning 'white river' in the Catawba language). This hardy species has greatly contributed to the creation of numerous ornamental hybrids and remains a fundamental foundation for modern rhododendron horticultural selections.
Where to buy it
Best planted in autumn so the roots settle in before summer, or in early spring once the frost has passed. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, October, November.
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Tips generated and checked by Viridia — adapt them to your local climate.