Also known as Bengal Clock Vine · Bengal Clockvine · Bengal Trumpet Vine
Bengal Trumpet (Thunbergia grandiflora) is a vigorous, evergreen climber with large, showy, pale blue to white trumpet-shaped flowers.
At-a-glance light, water, soil, and growing conditions from plant data
Full Sun to Partial Shade
75% intensity
Prefers at least 6 hours of direct sunlight daily for best flowering, but tolerates some shade.
Consistent Moisture
75% intensity
Keep soil evenly moist, allowing slight drying between waterings. Reduce in winter.
Well-drained
50% intensity
Warm
75% intensity
Thrives in temperatures between 18-24°C. Protect from frost; bring indoors if temperatures drop below 10°C.
Regular Feeding
50% intensity
Feed with balanced liquid fertilizer diluted to half strength during the growing season (spring/summer).
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
| Edible | No |
Toxic if ingested
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Water Thunbergia grandiflora regularly, ensuring the soil remains consistently moist but not waterlogged. Allow the top inch of soil to dry out slightly between waterings, especially during the growing season.
Reduce watering in cooler months when growth slows to prevent root rot.
Prune Thunbergia grandiflora in late winter or early spring before new growth begins. Remove any dead, damaged, or crossing branches. Pinch back the tips of stems to encourage bushier growth and more flowering.
This vine can become vigorous, so regular pruning is beneficial.
Propagate Bengal Trumpet from stem cuttings taken in spring or summer. Select healthy, non-flowering stems about 10-15 cm long.
Remove the lower leaves and dip the cut end in rooting hormone before planting in a moist, well-draining potting mix. Keep in a warm, humid environment.
Repot Thunbergia grandiflora every 2-3 years or when it becomes root-bound. Use a larger pot with fresh, well-draining potting soil. Spring is the ideal time for repotting.
Ensure the new pot has adequate drainage holes to prevent water accumulation.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Bengal Trumpet (Thunbergia grandiflora)
Where Bengal Trumpet (Thunbergia grandiflora) is found
Density
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Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Lamiales |
| Family | Acanthaceae |
| Genus | Thunbergia |
| Species | Thunbergia grandiflora |
Similar in genus Thunbergia
Answers based on plant encyclopedia data
