Black-Eyed Susan Vine in Zone 6a & 6b
Thunbergia alata
When to plant black-eyed susan vine in zone 6b
Zones 6a and 6b share the same average frost dates in our data, so this page covers both.
Method: Start indoors: Start indoors from seed, then transplant outside. Black-Eyed Susan Vine needs a head start most zones can't give it by direct-sowing alone.
| Start indoors | Mar 14–Mar 21 |
|---|---|
| Direct sow / transplant outside | May 9–May 16 |
| Estimated bloom | Aug 17–Aug 24 (~100 days after transplanting) |
Spacing: 1 per square foot (square-foot-gardening spacing). Mature height: 3-8 ft.
Black-eyed Susan vine shares a common name with a plant it is not related to, and the confusion is worth clearing up first.
How black-eyed susan vine fits zone 6's season
Zone 6b's frost-free window runs about 173 days, from April 25 to October 15. Black-Eyed Susan Vine needs about 100 days from transplant to first harvest.
Good companions
No standout companions recorded yet for Black-Eyed Susan Vine.
Where to buy black-eyed susan vine seeds
See why we recommend these suppliers →
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See it growing
Search YouTube for "growing black-eyed susan vine" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
← Back to the full zone 6b calendar · Full companion planting guide · Full plant profile · Plan your beds in the Garden Designer →
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Growing Black-Eyed Susan Vine in USDA zone 6b: when to start seeds indoors, when to direct-sow, and when to expect a bloom.
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