- Season: Annual
- USDA Zones: 3 - 10
- Height: 60 - 84 inches (vining)
- Bloom Season: Summer through fall
- Bloom Color: White
- Environment: Full sun
- Soil Type: Loamy, well-drained, pH 6.1 - 7.8
- Temperature: 75 - 80F
- Average Germ Time: 14 - 21 days
- Light Required: No
- Depth: 1/4 inch
- Sowing Rate: 3 seeds per plant
- Moisture: Keep seeds moist until germination
- Plant Spacing: 8 - 12 inches
- Care & Maintenance: See: Thunbergia
Thunbergia (Thunbergia Alata Sunrise White) - Gardeners fall in love with Thunbergia vine. Easily established from Thunbergia seeds, this annual is commonly called Black-Eyed Susan Vine. This white Black Eyed Susan vine is very quick to bloom, offers a super-long season of color, and has a classic color pattern that complements everything in the garden! The blooms reach about 1 1/2 inches in diameter when open wide. The petals are white, surrounding a bold black eye on most blooms. The blooms are profuse smothering the vine over a long bloom season clear up until frost.
White Thunbergia vines grows best in full sun. They needs average, well-drained soil. Plant seedlings 3 inches away from supports. Netting or strings make good trellis material. Solid fencing or large posts will need trellis material for the vine to climb. Space plants 8 - 12 inches apart. Pinch the tips of young Black-Eyed Susan plants to encourage branching. In areas of no frost, white Thunbergia vine will grow as a perennial. In colder climates, grow it as an annual, sowing the Thunbergia seeds each year. If grown in a container, Thunbergia Black Eyed Susan vine can be wintered indoors in a bright, sunny window.
It is recommended to soak the Black-eyed Susan vine seeds over night in tepid water. Following the soaking, sow Thunbergia seeds outdoors after the last frost in prepared seed bed. Or, to get a jump start on the growing season, sow Thunbergia Alata seeds indoors 6 - 8 weeks before outdoor planting. Thunbergia flower seeds germinate better on darkness.