Water Thunbergia grandiflora regularly, keeping the soil consistently moist but not waterlogged. Allow the top few centimeters of soil to dry out slightly between waterings.

Reduce watering during cooler, dormant periods. Ensure good drainage to prevent root rot, especially in containers.

Prune Thunbergia grandiflora in late winter or early spring before new growth begins. Remove any dead, damaged, or crossing stems. Cut back long, leggy shoots to encourage bushier growth and more prolific flowering.

This vigorous climber benefits from regular tidying.

Propagate Thunbergia grandiflora from semi-hardwood cuttings taken in summer or autumn. Insert cuttings into moist, well-draining potting mix. Alternatively, seeds can be sown in spring.

Cuttings generally root faster and produce plants true to the parent.

Repot Bengal Trumpet every 1-2 years, preferably in spring, when it becomes root-bound. Use a larger container with fresh, good-quality, well-draining potting soil.

Ensure the new pot has adequate drainage holes to prevent water accumulation around the roots.