This perennial vine is a vigorous twiner that may grow to 4m (12ft) in a season and may be used as an annual. It has bright green heart-shaped leaves and the orange wheel-shaped flowers have a black centre and appear during summer. summer. 

Hardiness zones 9 to 12

Thunbergia alata is naturally found from tropical Africa to South Africa growing in forests margins. It prefers an organic rich moist but well-drained sandy to clay soil with a pH range from 5.5 to 7.0 and grows in a open sunny wind protected position and is drought tolerant but frost tender.

Black Eyed Susan is grown for its bright flowers and rampant twinning growth habit. It is grown over lattice or a wire fence for screening and is trained over other structures. It is also planted in hanging baskets or patio pots and planter boxes where it is trained up poles. In open ground it can be as a trimmed to form a small shrub and establishes in one season from seed but may be short lived. In warmer areas it will flower and grow all year round but is normally replaced annually. ID 63

Note:
This plant is regarded as a weed in many regions and is discouraged from use in gardens.

Thunbergia (thun-BERG-ee-a) alata (ah-LAH-ta)

“Thunbergia” commemorates Swedish botanical author Carl Thunberg; “alata”, Latin, meaning “winged” - referring to the winged petioles.

Acanthaceae (ah-kanth-AY-see-ee)
Acanthus Family