Thunbergia

Cheerful, fast-growing climbers led by black-eyed Susan vine — warm orange, yellow and cream flowers with a dark chocolate eye on twining stems.
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Thunbergia seeds — cheerful climbers led by black-eyed Susan vine

Thunbergia brings fast, sunny colour to any vertical space — most famously as black-eyed Susan vine, a slender twining climber smothered in warm orange, yellow and cream flowers, each with a dark chocolate eye. The classic species is gathered under Thunbergia alata within our flower seed range. New to flowers? Our flower growing guide gets you started.

Quick to cover a trellis or basket — the calendar shows when to sow.

A versatile climber or trailer

Left to twine it scrambles up a trellis or wigwam among our climbing flowers; in a pot or basket it spills and trails, sitting equally well in our container-friendly flowers. For the botanical detail of black-eyed Susan vine, see Thunbergia alata.

Growing thunbergia from seed

Sow under cover in early to mid spring in warmth, covering the seed lightly. Grow on frost-free and plant out into full sun in a sheltered spot once the weather warms, giving it strings, canes or a frame to climb; keep it watered and it flowers right through to autumn.

Planning a climber or a trailing basket? Here's where to look next.

Popular flower categories: Thunbergia alata · Climbing Flowers · Container Flowers · Annual Flowers · All Flower Seeds

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What is the best-known thunbergia?
Black-eyed Susan vine (Thunbergia alata), a slender twining climber smothered in orange, yellow and cream flowers with dark centres. Can thunbergia be grown in a basket?
Yes — left without support it trails attractively, making it just as good in pots and hanging baskets as on a trellis. When should I sow thunbergia seed?
Sow under cover in early to mid spring in warmth, then plant out into full sun once the weather has warmed. How do I get the most flowers?
Give it a sheltered, sunny spot with something to climb, keep it watered, and it flowers freely right through to autumn.