Flower Garden · Seed to Bloom

How to grow black-eyed Susan vine

Grow fast-twining Thunbergia for warm orange, yellow, and cream flowers with dark centers on trellises, obelisks, and patio containers.

Start indoors for early coverageProvide support immediatelyProtect from cold
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Botanical illustration of orange cream and yellow Black-Eyed Susan Vine
Botanical nameThunbergia alataNot Rudbeckia
Sow depth¼ inchCover lightly
Germination7–21 daysWarm conditions
Spacing12–18 inchesGive vines airflow
Height5–8 feetSupport required

Flower profile

Cover a vertical space with warm color.

Black-eyed Susan vine is a tender twining annual, not the native daisy commonly called black-eyed Susan. Its heart-shaped foliage climbs quickly once warm weather arrives.

Support before plantingInstall a trellis, obelisk, or strings first. Young stems begin twining early and are difficult to untangle later.

black-eyed Susan vine at a glance

From seed to a productive flower display

01Sow6–8 weeks early02Sprout7–21 days03Pot onAdd a small support04HardenAfter frost05ClimbGuide young vines06BloomSummer to frost

Planting

Start warm and give roots room.

Sow indoors for dependable early coverage, then transplant only after nights and soil have warmed.

01

Sow in individual cells

Plant about ¼ inch deep in moist mix and provide roughly 70–75°F warmth.

02

Light and support seedlings

Move emerged plants into strong light and add a small stake before stems tangle.

03

Plant beside the final support

Harden gradually, space 12–18 inches apart, and guide stems loosely onto the structure.

Ongoing care

Keep plants healthy and flowers productive

Give sun and warmth

Full sun produces the heaviest flowering; afternoon relief can help in extreme heat.

Water containers steadily

Keep soil evenly moist but drained, especially when roots fill a pot.

Guide, do not bind

Weave young stems through support without tight ties.

Feed lightly

Excess nitrogen creates leaves at the expense of flowers.

Season checkpoints

Follow the plant’s visible progress.

7–21 days

Seedlings emerge

4–6 weeks

Vines begin twining

Warm weather

Growth accelerates

Summer to frost

Flowers continue

Vertical garden display

Keep the vine flowering on its support.

Black-eyed Susan vine is primarily enjoyed as a living display. Remove faded flowers and wayward shoots, and redirect growth to fill bare areas.

  1. Deadhead for a tidy display.
  2. Trim only to control direction.
  3. Bring containers inside before frost if desired.

Urban Farmer selections

Grow the warm-color vine mix

Mixed Black-Eyed Susan Vine product imageClimbing · warm mixMixed Black-Eyed Susan VineOrange, yellow, and cream flowers with dark eyes for quick vertical color.Checking availability…Shop Mixed Black-Eyed Susan Vine →

Questions flower gardeners ask

Black-eyed Susan vine growing FAQ

Is black-eyed Susan vine the same as black-eyed Susan?

No. This vine is Thunbergia alata; the daisy-like native flower is Rudbeckia.

When should seed be started?

Start indoors about 6–8 weeks before the last expected frost.

How deep should seed be planted?

Cover about ¼ inch.

How warm should germination be?

Steady warmth near 70–75°F is useful.

When can it go outside?

Transplant after frost danger when nights and soil are warm.

Does it need a trellis?

Yes. Provide a trellis, strings, fence, or obelisk before vines begin rapid growth.

Can it grow in containers?

Yes; use a large drained pot and a stable support.

Why is it leafy but not flowering?

Too much nitrogen, too little sun, or cool conditions can delay bloom.

How tall does it grow?

Most plants climb about 5–8 feet in a season, depending on conditions.

Can it survive winter?

It is usually grown as a tender annual, though containers can be protected indoors.

Ready to plant?

Turn a sunny support into a wall of warm flowers.

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