Trachelospermum asiaticum 'Theta'

RHS Plant Profile

Asiatic jasmine 'Theta'

Climber Wall Shrub

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A woody, evergreen, twining climber about 7-9m in height, with narrow, glossy, grey-green to mid-green leaves, 8cm long with silvery veins, turning bronze-purple in winter, and sweetly-scented, creamy-white flowers in mid and late summer that fade to pale yellow with age

Position

Full sun, Partial shade

Soil Types

Chalk, Loam, Sand

Max Height

8-12 metres

Max Spread

4-8 metres

Size

Time to Maturity: 5–10 years
Max Spread: 4-8 metres
Max Height: 8-12 metres

Growing Conditions

Chalk Loam Sand

Moisture: Well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun Partial shade

Aspect: South–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): H4

Colour & Scent

Fragrance Flower

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Apocynaceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Climbing
Genus: Trachelospermum are self-twining evergreen climbing shrubs with glossy ovate leaves and jasmine-like, highly fragrant flowers, sometimes followed by bean-like seed-pods
Name Status: Accepted

How to Grow

Cultivation

Grow in fertile well-drained soil in full sun or partial shade with shelter from cold winds; for conservatory or greenhouse cultivation grow in a container in peat-free, loam-based potting compost in full light with shade from hot sun. See trachelospermum cultivation

Propagation

Propagate by layering in autumn or semi-ripe cuttings in summer

Suggested planting locations and garden types

City and courtyard gardens
Coastal
Cottage and informal garden
Patio and container plants
Low Maintenance
Climber and wall shrubs
Conservatory and greenhouse
Wall side borders

Pruning

Pruning group 11 in early spring but not usually required

Pests

May be susceptible to cushion scale, mealybugs and glasshouse red spider mite under glass

Diseases

May be susceptible to honey fungus