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Thunbergia grandiflora (Blue trumpet vine)
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1 hour care
per year
per year
10m
Max height
Max height
5m
Max spread
Max spread
1-2 years
To maturity
To maturity
Plant details
Botanical name
Thunbergia grandiflora
Other names
Blue trumpet vine, Bengal clock vine, Bengal trumpet, Blue skyflower, Blue-sky flower vine
Genus
Thunbergia Thunbergia
Species
T. grandiflora - T. grandiflora is a tender, vigorous, twining, evergreen shrub with toothed, heart-shaped, dark green leaves and trumpet-shaped, pale violet-blue flowers with yellow throats blooming in summer.
Thunbergia grandiflora is: Deciduous
Habit
Climbing, Twining
Awards
RHS AGM (Award of Garden Merit)
Flower
Violet, Pale-blue in Summer
Foliage
Dark-green in All seasons
How to care
Watch out for
Specific pests
Aphids , Glasshouse red spider mite , Glasshouse whitefly , Scale insects Aphids , Glasshouse red spider mite , Glasshouse whitefly , Scale insects
General care
Pruning
Pruning group 11. Prune after flowering, or in late winter or early spring to fit available space.
Propagation methods
Seed, Softwood cuttings
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Where to grow
Thunbergia grandiflora (Blue trumpet vine) will reach a height of 10m and a spread of 5m after 1-2 years.
Suggested uses
Conservatory, Containers, Greenhouse, Sub-Tropical
Cultivation
Grow under glass in a loam-based compost in bright, filtered light with shade from intense sunlight. Water moderately when in growth and apply liquid fertiliser once a month. Water sparingly when dormant.
Soil type
Loamy
Soil drainage
Moist but well-drained, Well-drained
Soil pH
Acid, Alkaline, Neutral
Light
Full Sun
Aspect
South, West
Exposure
Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Indoor heated (H1)
Companion plants
We do not currently have companion plants added for this plant.
Botanical name
Thunbergia grandiflora
Other names
Blue trumpet vine, Bengal clock vine, Bengal trumpet, Blue skyflower, Blue-sky flower vine
Genus
Thunbergia Thunbergia
Species
T. grandiflora - T. grandiflora is a tender, vigorous, twining, evergreen shrub with toothed, heart-shaped, dark green leaves and trumpet-shaped, pale violet-blue flowers with yellow throats blooming in summer.
Foliage
Deciduous
Habit
Climbing, Twining
Awards
RHS AGM (Award of Garden Merit)
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Colour
Flower
Violet, Pale-blue in Summer
Foliage
Dark-green in All seasons
How to care
Watch out for
Specific pests
Aphids , Glasshouse red spider mite , Glasshouse whitefly , Scale insects
General care
Pruning
Pruning group 11. Prune after flowering, or in late winter or early spring to fit available space.
Propagation methods
Seed, Softwood cuttings
Monthly care advice
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Where to grow
Thunbergia grandiflora (Blue trumpet vine) will reach a height of 10m and a spread of 5m after 1-2 years.
Suggested uses
Conservatory, Containers, Greenhouse, Sub-Tropical
Cultivation
Grow under glass in a loam-based compost in bright, filtered light with shade from intense sunlight. Water moderately when in growth and apply liquid fertiliser once a month. Water sparingly when dormant.
Soil type
Loamy
Soil drainage
Moist but well-drained, Well-drained
Soil pH
Acid, Alkaline, Neutral
Light
Full Sun
Aspect
South, West
Exposure
Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Indoor heated (H1)
USDA zones
Zone 11, Zone 10, Zone 9, Zone 8
In order to add a note on this plant, please add this plant to your plant lists.
| This plant likes... | Garden match | |
| Soil types: | Loamy | Tell us... |
| Soil drainage: | Moist but well-drained, Well-drained | Tell us... |
| Soil pH: | Acid, Alkaline, Neutral | Tell us... |
| Light: | Full Sun | Tell us... |
| Aspect: | South, West | Tell us... |
| Exposure: | Sheltered | Tell us... |
| Hardiness: | Indoor heated (H1) | Tell us... |
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