Thunbergia grandiflora
Bengal clock vine, Blue trumpet vine, Skyflower skyvine, Fausto
- Height × spread
- 15m × 15m
- Position
- Full sun
- Hardiness
- Heated greenhouse 10C & above (RHS H1b)
- Flowers
- Summer, Autumn
Availability
Please ask in store about availability
Many plants are seasonal. Call 01234 567890 to check current stock.
About this plant
This is a tender, vine which cannot take temperatures below 10 degrees C, so for warm greenhouse culture in Britain and Ireland. The flowers are large trumpets, a soft lavender-blue, yellow throated, held pendantly both singly and in clusters. It is summer flowering. The foliage has variably shaped, dark-green, leaves. This vine twines up to 10m (33ft) height and spread.
- Flower colour
- Blue, Purple
- Foliage colour
- Green
- Variegated
- No
- Scent
- No
- Shape
- Fan
- Height
- 15m
- Spread
- 15m
- Season of interest
- Summer, Autumn
- Flowers in
- Summer, Autumn
- Evergreen
- Evergreen
- Garden style
- Mediterranean garden, Conservatory
- Sun or shade
- Likes full sun
- Soil type
- Chalk, Clay, Gravelly soil, Loam (normal), Sandy soil
- Soil pH
- All types
- Drainage
- Moisture retentive soil, Well drained soil
- Hardiness
- Heated greenhouse 10C & above (RHS H1b)
- Borders & containers
- Borders and containers
- Use for
- Wall cover
- Walls
- South, West facing
- Hazards
- No
- Pet safe
- Yes – listed in our pet-safe plants
Spring
Spring - late · Outdoors
Feed with slow release fertiliser
Apply a general purpose slow release fertiliser, spreading it around the root area of the plant as it is coming into growth. (Or apply a liquid feed at regular intervals throughout the growing season.)
This is a simple way to provide a nutrient boost as a single annual procedure.
Spring-Autumn · Outdoors
Water to keep the soil moist
For best results, this plant needs soil that is always moist. Water deeply and regularly as soon as soil appears dry. Even for established plants in the ground, a dry week can cause problems with some soils. Check plants in pots more often, especially in hot weather. Or install an automatic irrigation system which will do the hard work for you, even when you are away on holiday.
Without regular watering some plants never fully regain their beauty.
Summer
Summer-Autumn · Planting
Support young plants
Provide support for young plants, and tie in any growth to the support to keep it tidy.
Winter
Winter - late · Planting
Prune to maintain the plant
Remove and dead or damaged branches or any growth that looks very untidy. Trim the plant back if necessary to keep it within bounds.
Planting & general
Compost · Planting
Loam based houseplant compost for repotting
Buy container or house plant compost that is loam based if possible (i.e. is based on John Innes compost number 2 or 3. This contains more fertiliser and is better suited to established plants.
John Innes no. 1 has the lowest level of fertiliser and is used for seedlings and young plants, so is generally used where plants will be 'potted on' after a number of weeks.
Found in
More Thunbergia
Thunbergia
Black-eyed Susan
Thunbergia alata
Black-eyed Susan, Clock vine
Thunbergia alata
Black-eyed Susan, Clock vine
Thunbergia alata 'Sunny Lemon Star'
Black-eyed Susan, Clock vine
Thunbergia alata 'Sunny Pink Beauty'
Black-eyed Susan, Clock vine
Thunbergia alata 'Sunny Susie Brownie'
Black-eyed Susan, Clock vine