Will 'Sunny Lemon Star' Black-Eyed Susan Vine Return Next Year?

A gardener planted the hybrid climbing 'Sunny Lemon Star' black-eyed Susan vine (Thunbergia alata) and asked if it would regrow.

Annual in Most Zones

Thunbergia alata is an annual in USDA zones 2–9. Only in frost-free southern Florida, California, and Nevada might it survive as a perennial. Elsewhere, roots die in winter.

Hybrid Seed Warning

As a hybrid, seeds rarely produce vigorous, true-to-type plants. Best to buy new plants each year.

Overwintering Option (If You Have Space)

• Before first frost, dig up, cut back to near ground level.
• Store root ball in a cool (45–55°F), dark basement, barely moist.
• Or keep under grow lights.
• Cut back in late spring, plant out after frost.

For most, replanting annually is simpler and more reliable.