Dendrobium × delicatum

RHS Plant Profile
hybrid rock orchid

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hybrid rock orchid RHS
hybrid rock orchid RHS
Conservatory Greenhouse

An epiphytic orchid with usually two to fivethick leaves, 7-17cm long, at the top of each pseudobulb. Clusters of white to very pale pink, sweetly-scented flowers are borne on 25cm long stems

Position

Partial shade

Soil Types

Loam

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
2–5 years
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

Loam
Moisture
Well–drained
pH
Acid or Neutral

Position

Partial shade
Aspect
North–facing or West–facing or East–facing
Exposure
Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

  • H1A: under glass all year (>15C)
  • H1B: can be grown outside in the summer (10 - 15)
  • H1C: can be grown outside in the summer (5 - 10)
  • H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
  • H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
  • H4: hardy through most of the UK (-10 to -5)
  • H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
  • H6: hardy in all of UK and northern Europe (-20 to -15)
  • H7: hardy in the severest European continental climates (< -20)
H1C

Colour & Scent

Fragrance Flower
Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Orchidaceae
Native to GB/Ireland
No
Foliage
Semi evergreen
Habit
Columnar upright
Genus
Dendrobium are epiphytic and terrestrial orchids with elongated, stem-like pseudobulbs bearing linear to ovate leaves. Racemes or panicles of showy flowers are produced from nodes along the stems mainly in spring
Name Status
Correct
Plant Range
Eastern Australia

How to Grow

Cultivation

Grow in epiphytic orchid compost and from late spring to summer, in partial shade with good ventilation, day temperatures between 18-25°C and night above 10°C, water freely adding orchid fertiliser every third watering and provide high humidity by misting twice daily. Keep in well lit conditions from autumn to early spring and keep dry in winter. See indoor orchid cultivation

Propagation

Propagate by division when the plant over-fills the pot

Suggested planting locations and garden types

  • Patio and container plants

Pruning

No pruning required, cut down flowered stems as necessary

Pests

Susceptible to aphids, glasshouse red spider mite and mealybugs

Diseases

Generally disease-free.