Overview
Dendrobium rennellii is a clump forming, columnar upright orchid in the genus Dendrobium, part of the Orchidaceae family, with evergreen foliage. Dendrobium rennellii grows best in full sun and partial shade, and tolerates loam soils and neutral pH. Its UK hardiness is rated H1a. Suggested uses include houseplants and conservatory and greenhouse.
About
Dendrobium rennellii is a clump-forming, columnar upright orchid cultivar within the Dendrobium genus, known for its elongated pseudobulbs and narrow to oval evergreen leaves. This orchid produces prominent flowers in spring and summer from racemes or panicles emerging at the stem nodes. It thrives in well-drained, neutral loam soil under full sun or partial shade, ideally in a sheltered position with any aspect exposure. Suitable for cultivation as a houseplant or in conservatories and greenhouses, it requires planting at the appropriate depth and can be propagated by division or keiki removal.
Growing conditions
Best soil and position for Dendrobium
- Sunlight
- Full sun, Partial shade
- Soil type
- Loam
- Soil pH
- Neutral
- Soil moisture
- Well-drained
- Aspect
- East-facing, West-facing, North-facing, South-facing
- Exposure
- Sheltered
- UK hardiness
- H1a
Plant details
Dendrobium rennellii size, habit and characteristics
- Plant type
- Orchid
- Habit
- Clump forming, Columnar upright
- Foliage
- Evergreen
- Suggested uses
- Houseplants, Conservatory and greenhouse
Care notes
Pruning and caring for Dendrobium rennellii
- Propagation
- Division, Keiki removal
- Pest resistance
- Scale insects, Aphids, Mealybugs, Red spider mite
Frequently asked questions
Where is the best place to plant Dendrobium rennellii?
Dendrobium rennellii prefers full sun and partial shade. It suits sheltered positions.
What soil does Dendrobium rennellii need?
Dendrobium rennellii grows best in loam soil. It prefers neutral soil. Aim for soil that stays well-drained.
Is Dendrobium rennellii hardy in the UK?
Dendrobium rennellii has an RHS hardiness rating of H1a, meaning it needs tropical warmth above 15°C and must be grown under glass in the UK.
How do I propagate Dendrobium rennellii?
Division, Keiki removal.
More in the Dendrobium genus
- Dendrobiumdendrobium
- Dendrobium amplumblack-tongued orchid
- Dendrobium aphrodite
- Dendrobium bracteosum
- Dendrobium bullenianum
- Dendrobium bursigerum
- Dendrobium christyanum 'Lillian'
- Dendrobium chryseum
