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Black-eyed Susan Vine growing in a garden
Annual flower

Black-eyed Susan Vine plant profile

Thunbergia alata

An annual flower for full sun.

Last updated .

When to plant Black-eyed Susan Vine

Black-eyed Susan vine is a showy tender tropical twining vine grown as an annual, with orange-to-yellow dark-throated flowers that bloom from summer through fall (NC State), best after the peak of summer heat. Sow seed or set plants out in late spring once frost has passed, in full sun with some afternoon shade, on a trellis, fence, or in a hanging basket. It reseeds easily and can be weedy in frost-free areas.

The calendar shows this cited seasonal window as an approximate band. It does not convert the season into frost-adjusted dates.

Open Black-eyed Susan Vine in my garden calendar

Shows the source-backed planting season, not frost-adjusted dates.

Sun
Full sun
Lifecycle
Annual

Watch for these

Also watch for: scale, whitefly, weedy.

Evidence behind this profile

Original extension and institutional publications behind the planting, care, and safety facts on this page.

  1. Thunbergia alata (Black-eyed Susan Vine, Thunbergia)

    North Carolina Extension Gardener Plant Toolbox (NC State Extension). Supports general reference. Checked 2026-06-18.