How to Grow Black Eyed Susan Vine

Thunbergia alata · Zones 10-11

Black Eyed Susan Vine is a perennial grown for its orange blooms, which open in summer and return year after year. It's hardy across USDA zones 10 through 11, shrugs off deer and grows just as well in a container as in the ground. Its summer flowers are a moderate draw for honeybees, butterflies, and hummingbirds.

Zones

10-11

pH Range

5.5-7.5

Sun

Full Sun

Days to Maturity

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What Black Eyed Susan Vine is

Black Eyed Susan Vine grows as a perennial and reaches around eight feet at maturity. It blooms orange in summer. It's also deer-resistant and well suited to containers.

How to grow Black Eyed Susan Vine

Black Eyed Susan Vine grows in USDA zones 10 through 11. Black Eyed Susan Vine does best in full sun — at least 6 hours of direct sun a day — and soil from pH 5.5 to 7.5, on well-drained ground. It needs around 2,500 growing degree days to mature and a growing season of at least 90 frost-free days, which is why climate matters as much as soil.

USDA Zones

10-11

USDA PHZM 2023

Soil pH

5.5 - 7.5

USDA PLANTS Database

Sun

Full Sun

Growable Ground plant catalog

Drainage

well (dry spells)

Growable Ground plant catalog

GDD Required

2500+

Growing degree-days of accumulated warmth it needs to mature — humid summers reach this faster than cool coastal ones.

Growable Ground plant catalog

Mature Height

8 ft

Growable Ground plant catalog

Frost-Free Days

90+

The frost-free stretch it needs start to finish — short-season areas may need an indoor head start.

Growable Ground plant catalog

  1. Start the season right

    Plant black eyed susan vine in full sun with at least 6 hours of direct sun, once the soil has warmed and frost risk has passed.

  2. Match the soil

    Black Eyed Susan Vine prefers pH 5.5 to 7.5 (Growable Ground Plant Database). A quick soil test from your local Extension lab tells you whether to add lime or sulfur to land in band.

  3. Water steadily

    Keep the root zone evenly moist through establishment. A 2–3 inch mulch layer holds moisture without waterlogging.

  4. Harvest at its peak

    Cut black eyed susan vine blooms in the cool of the morning, just as they open, for the longest display.

Good to know

Good news for pet owners — black eyed susan vine isn't known to be toxic to dogs or cats. (Source: ASPCA.)

Black Eyed Susan Vine offers moderate value to bees and other pollinators. (Source: Pollinator Partnership.)

Where Black Eyed Susan Vine thrives

Black Eyed Susan Vine is hardy across USDA zones 10 through 11. Zone is only the starting point, though: the soil pH, drainage, and frost dates on your specific land decide how well it actually does.

Zones 10–11 highlighted on the USDA national hardiness zone map

Zones 10–11·Where Black Eyed Susan Vine growsOpen map →

On USDA hardiness-zone overlap, Black Eyed Susan Vine can grow in these states:

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Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether black eyed susan vine actually takes — we score it against the real conditions at your address.

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Frequently Asked Questions

Can I grow Black Eyed Susan Vine in my zone?

Black Eyed Susan Vine grows in USDA hardiness zones 10 through 11 (USDA PHZM 2023). Zone is one factor — soil pH, drainage, and frost dates on your specific parcel also shape whether it takes.

When should you plant Black Eyed Susan Vine?

Most growers plant black eyed susan vine after the last spring frost, once the soil has warmed, leaving enough of the season for its 90-day frost-free need. Your local frost dates set the exact window — a Growable Ground report reads them for your address.

How much sun does Black Eyed Susan Vine need?

Black Eyed Susan Vine needs full sun — a spot that catches at least 6 hours of direct summer sun a day. In more shade it still grows, but usually gives a smaller, later crop. The catch is that a yard rarely gets even light everywhere — a fence, the house, or one tall tree can quietly take those hours. A Growable Ground report reads the real sun-hours across your land, canopy and buildings included, so you can pick the brightest bed before you plant.

What soil does Black Eyed Susan Vine need?

Black Eyed Susan Vine prefers soil pH 5.5 to 7.5, on well-drained ground (Growable Ground Plant Database). Your report scores your parcel's actual soil against that using USDA SSURGO data.

Does Black Eyed Susan Vine attract pollinators?

Yes — black eyed susan vine's flowers are a solid nectar source for honeybees, butterflies, and hummingbirds. (Source: Pollinator Partnership.)

Is Black Eyed Susan Vine safe for pets?

Black Eyed Susan Vine is not known to be toxic to dogs or cats based on available data. Always supervise pets around new plantings. (Source: ASPCA.)