Phalaenopsis 'Diffusion'

RHS Plant Profile

moth orchid 'Diffusion'

Conservatory Greenhouse Houseplants

Small to medium sized, evergreen, upright growing epiphytic orchid. Broadly oval, silvery mottled leaves emerge from the centre of the plant and are main storage of water and nutrients. New flowering stems emerge from the base of older leaves. Up to 20 fragrant, long- lasting flowers are carried on branched racemes up to 40 cm tall. Dark pink flowers, measuring 4 - 6 cm across are bilaterally symmetrical with pink lip and yellow centre, and distinct while column.

Position

Partial shade

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

Moisture: Well–drained
pH: Neutral

Position

Partial shade

Aspect: East–facing or West–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): H1A

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Orchidaceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Columnar upright
Genus: Phalaenopsis are a large genus of species and hybrid mainly epiphytic orchids. Short, upward growing, stem-like rhizomes with no pseudobulbs produce oval, fleshy mid to dark green leaves and flowers in branched racemes from the base of the leaves
Name Status: Unresolved

How to Grow

Cultivation

Grow in an open bark-based orchid compost. Provide enough bright filtered light, but keep away from direct mid-day sunlight or heating source. Ideal temperatures are around 17°C at night and 20 - 25 °C during day. Mist aerial roots regularly and water the plant when almost dry - pale, silvery roots are a good indication when to water. Orchid fertiliser can be applied regularly throughout the season. See Phalaenopsis cultivation.

Propagation

Propagation by seed is only possible in controlled laboratory environment. Mature plants may produce sideshoots (keiki) which may be removed and potted separately 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. Cut back flowered stem to lower node to encourage further flowering.

Pests

May be susceptible to mealybugs, aphids and scale insects.

Diseases

Generally disease-free