Dendrobium mortii

RHS Plant Profile
slender pencil orchid
slender pencil orchid Valeria Valkova
Conservatory Greenhouse

A small to medium-sized, epiphytic or lithophytic, tropical orchid with thin, pencil-like, fleshy green leaves, approximately 4-10cm long. Thin, pendulous stems grow up to 70cm long. Solitary, upside-down flowers emerge from the axils of leaves and are approximately 2cm across. Petals and sepals are pale green, lip is white with purple markings.

Position

Full sun, Partial shade

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
5–10 years
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

Moisture
Well–drained
pH
Neutral

Position

Full sun Partial shade
Aspect
East–facing or South–facing or North–facing or West–facing
Exposure
Sheltered
Hardiness
H1C

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Orchidaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Pendulous weeping, Trailing
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
Australia (NSW, Queensland)

How to Grow

Cultivation

Plants are best grown mounted on cork bark or wood if sufficient humidity can be provided. Alternatively, grow in a basket in an epiphytic, medium grade, bark-based potting mix with added perlite, moss, or coir. As with many orchids, they grow best when the roots are slightly restricted. Therefore, avoid over-potting or frequent root disturbance. Provide bright light and sufficient humidity by misting regularly throughout the growing season. Reduce watering and feeding in winter until warmer temperatures initiate flowering and new growth in spring. See indoor orchid cultivation

Propagation

Propagation by seed is only possible in controlled laboratory environment. Mature plants may be divided when the plant overgrows the pot. Sideshoots (keiki) may develop on older canes - remove and pot them into sphagnum moss when the new roots are at least 2cm long.

Suggested planting locations and garden types

  • Houseplants
  • Conservatory and greenhouse

Pruning

No pruning required.

Pests

May be susceptible to scale insects, aphids, mealybugs and red spider mite.

Diseases

Generally disease-free.