Black-eyed Susan Vine Thungbergia Flower Seeds

Black-eyed Susan vine peeks through summer with bright orange and yellow faces, each centered by a deep, dramatic eye. Heart-shaped leaves clothe the graceful twining stems, giving a trellis, small arbor, or hanging basket a quick old-fashioned flourish.

The 4–5-foot vine starts deliberately, then gathers speed as warm weather settles in. Its cheerful 1½-inch flowers arrive in profusion at midsummer, bringing color to vertical spaces without the weight of a woody climber.

• Botanical name: Thunbergia alata
• Life cycle: Tender annual vine
• Colors: Orange and yellow with dark centers
• Exposure: Full sun
• Sowing: Direct sow in warm soil or start indoors 5–6 weeks early
• Planting depth: 1/2 in.
• Germination: 14–21 days
• Mature height: 4–5 ft.
• Final spacing: 6 in.
• Approximate seed count: 25–30

Provide a support at planting time, or let the stems spill from a basket for a pyramid of bloom. Discover more distinctive vines in our flower seed packets.