Thunbergia alata - 'Black-eyed Susan'
Thunbergia alata or 'Black-eyed Susan' is the best known, some species are regarded as invasive. Thunbergia are generally regarded as frost tender and in cooler climates are best planted in a sheltered sunny spot in a moist, humus rich, well drained soil.
Thunbergia alata is widely grown in hanging baskets, being such as easy care and hardy plant especially in Zones 9 - 11 where they can be grown outdoors. However the popularity does not stop in the warmer zones.
They are also loved in cooler climates where Thunbergia alata or 'Black-eyed Susan' can be grown on an enclosed patio with little difficulty.
Flower color varies from orange with a deep red to black eye, and also white, red and cream. You can buy mixed packets of seeds and create a good colorful display. They are widely grown from Florida to New York and Virginia to California.
Many species are regarded as invasive, check with local nurseries for specific information.
- Thunbergia alata or 'Black-eyed Susan'
Well known climbing plant.
- Thunbergia mysorensis or 'Clock Vine' is a n evergreen climbing vine native to India. Showy yellow and red/brown flowers.
- Thunbergia grandiflora Native to India and ism a vigorous fast growing vine, can be invasive.
- Thunbergia erecta or 'Bush clock-vine'or 'Kings Mantle' is a sprawling shrub native to tropical Africa. Responds well to pruning to keep it in shape.
- Thunbergia fragrans or 'Sweet clock-vine' vigorous fast growing vine, can be invasive.
- Thunbergia laurifolia or 'blue trumpet vine' is native to India and Africa, regarded as invasive.
- Thunbergia annua 'Laurel Clockvine' vigorous fast growing vine, can be invasive.