Black-eyed Susan Vine

Scientific Name: Thunbergia alata
Common Names: Black-Eyed Susan Vine, Clockvine, Winged Thunbergia

Native to: Eastern Africa
Lighting Requirements: Full sun to partial shade
Height: 6 to 10 feet (as a climbing vine)
Width: 3 to 6 feet (spreads moderately)
Winter Look: Annual in Central Texas (perennial by seed, though)

Seasonal Interest: Abundant blooms from late spring to fall; flowers are typically orange with a dark purple-black center, though cultivars are available in yellow, white, pink, and red shades
Drought Tolerance: Moderate; thrives with consistent moisture but tolerates short dry periods once established
Soil Requirements: Well-drained, fertile soil with moderate organic matter
pH Range: Slightly acidic to neutral (6.0–7.5)
Hardiness Zones: USDA Zones 9–11
Deer Resistance: Moderate; deer generally avoid it
Attracts: Bees, butterflies, and other pollinators
Potential Issues: Can become invasive in frost-free climates; susceptible to aphids, spider mites, and powdery mildew in humid conditions
Notes: Thunbergia alata is a fast-growing, twining vine that brings vibrant color to trellises, fences, and hanging baskets. Its cheerful, daisy-like flowers with a distinctive dark "eye" make it a favorite for adding vertical interest to gardens. The plant performs best with some support, as its twining stems readily climb structures. Regular watering and occasional fertilization encourage abundant blooms.

I grow Black-eyed Susan Vine on my fence every year, and it's just beautiful! I have learned that you should cut it back as soon as a freeze hits it. If you let the leaves dry out, the little hairs on them get all over your skin, and it's very irritating!