Vanda sanderiana
A large-sized, evergreen, tropical, hot-growing epiphytic orchid species. As an example of monopodial orchid, the new growth emerges from a central tip on top of the upright, stem-like rhizome. The rhizome is covered in alternate, leaf-bearing sheaths. Strap-shaped leaves up to 50cm long angle out from the main stem. As new leaves appear from the tip, old, lower leaves gradually drop off. A characteristic feature is an aerial root system at the base of the plant. New roots emerge from the main rhizome, following the ascending growing trend. This species has been a major element in developing modern hybrids for its characteristic flat, two-tone, long-lasting flowers. The flowers - 8 to 12cm in diameter, are carried on a 30cm long stems. The inflorescences, often produced in pair, flower simultaneously, are usually shorter than leaves, and carry 7 - 10 densely arranged, fragrant flowers. Petals are slightly smaller than sepals, and rounded. Two lower sepals are disticntly dark, with red tesselated pattern. Dorsal sepal and petals are white or pale pink, with dark brown-red spots around the centre of flower. Small lip is three-lobed, with the two side lobes distinctly wider that other species.
Size
Ultimate height
0.5–1 metresTime to ultimate height
5–10 yearsUltimate spread
0.5–1 metresGrowing conditions
Moisture
Moist but well–drainedpH
NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Green | |||
|---|---|---|---|---|
| Summer | Green | |||
| Autumn | White Red Pink Brown | Green | ||
| Winter | Green |
Position
- Full sun
- Partial shade
Aspect
East–facing or South–facing or West–facing
Exposure
Sheltered Hardiness
H1ABotanical details
- Family
- Orchidaceae
- Native to GB / Ireland
- No
- Foliage
- Evergreen
- Habit
- Columnar upright
- Genus
A medium to large-sized, evergreen, tropical epiphytic orchid, valued for its large, bright-coloured, long-lasting flowers, often used by florists. As a typical example of a monopodial orchid, the new growth emerges from a central tip on a long, central rhizome, while older, lower leaves gradually drop off. Strap-shaped, green or dark-green leaves, up to 60 cm long angle out from the main stem. A characteristic feature of the plant is an impressive root system that hangs downwards at the base of the plant. New roots emerge from the central stem, following the ascending growing trend. Inflorescences emerge from axils of leaves and main stem, and carry up to 8 large, waxy, round-shaped flowers.
- Name status
Correct
- Plant range
- Philippines
How to grow
Cultivation
For successful cultivation and frequent flowering, plants require high light levels and long, light days. In summer, they would benefit from being in a warm and bright greenhouse or conservatory, but direct, mid-day sun should be avoided. Highly absorbent, sponge-like roots are the principal water-storage organs. Dark green or purplish tips of the roots may be observed as a sign of actively growing plant. They are heavy feeders and require regular application of orchid fertiliser between spring and autumn. High air humidity (70 -80%), good air circulation and regular misiting should be provided frequently when in active growth. In cooler climates with shorter days, plants may go dormant in winter. Misting may be reduced to avoid rots, but plants shouldn't be left dry for long periods. Ideal temperature range is 15°C in winter and up to 30°C during summer months. Plants can be grown in an open baskets, or in a coarse, bark-based epiphyte orchid mix.
Propagation
Propagation by seed is only possible in a controlled laboratory environment. Mature plants produce sideshoots (keiki) which may be removed and potted separately, when the new roots (preferably 3 or more) are at least 2cm long.
Suggested planting locations and garden types
- Conservatory and greenhouse
Pruning
Remove spent flower stems at the base. Old, ''leggy'' plants with bare stems can be cut during their active growing season to reduce the size of the plant. Cut through the rhizome, below the new developed set of aerial roots. Lowering apical dominance by laying plant horizontally, or hanging upside down will support the growth of new roots.
Pests
May be susceptible to scale insects and mealybugs. Thrips can cause damage on flowers and developing flower buds.
Diseases
Generally disease-free. Poor air movement may cause bacterial or fungal rots. Good hygiene practice and sterilising cutting tools prevent the spread of virus diseases.
Get involved
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