Thunbergia grandiflora is also known as Bengal trumpet, sky flower or Bengal clock vine. This vine is native to Southeastern Asia, and more precisely to India. It bears wide flowers that are generally sky-blue or lavender-blue. Some varieties (E.g. 'Alba') have pure white flowers.
This vine can be grown outdoors in frost-free areas. (USDA zones 10b-11) It is sometimes reported to be root-hardy to moderate frosts (24°F-28°F, -2°C to -5°C) but the foliage will be damaged by the slightiest frost.
Some varieties were selected, among which :
T. grandiflora 'Alba' - with pure white flowers
T. grandiflora 'Augusta Blue' - with sky-blue flowers
Note: This vine is considered as an invasive species in some tropical and subtropical areas, including the Hawaii islands (USA), some areas in Australia and Singapore. Leaves of the clock vine are opposite, leathery, dark-green and somehow heart-shaped.
Thunbergia grandiflora generally has tubular sky-blue flowers, which are 1.5-2.5 in (4-6 cm) wide. These flowers are grouped in terminal clusters.
Thunbergia grandiflora requiert les expositions suivantes : mi-ombre,lumière,soleil This vine requires a well-drained and fertile ground.
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Category - vine
Dimensions
Height 10.00 m
Width 10.00 m
Minimum temperatures
The plant is likely to die as soon as temperature is below 0.0 °C
Leaves and other aerial parts are damaged as soon as temperatures drops to 13.0 °C
Exposure - partial shade, light, full sun
Leaves - evergreen
Flowers - Color(s) : white, blue
Propagation - cutting, layering, seeds This plant can be propagated by seeds in spring, cuttings in late spring to early autumn, and air layers in spring.
Toxicity No or unknown toxicity.
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