Thunbergia, or black‑eyed Susan vine, is a fast‑growing, twining annual (perennial in Zones 9–10) with cheerful yellow, orange, or white flowers with dark centers. Native to South Africa, it blooms all summer.
Plant in moist, well‑drained, fertile soil in full sun. Provide a trellis, fence, or pole for support. Feed monthly with a balanced fertilizer during the growing season.
Water consistently; do not let soil dry out completely. Pinch back to encourage bushiness. In cold climates, treat as an annual or bring containers indoors before frost—place in a bright, cool room and water sparingly.
Perfect for trellises, arbors, hanging baskets, and window boxes. Combines well with morning glories and moonflowers.
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