Black-Eyed Susan Vine 'Lemon Star'

Thunbergia alata

Family: Acanthaceae (ah-kanth-AY-see-ee) (Info)
Genus: Thunbergia (thun-BER-jee-uh) (Info)
Species: alata (a-LAY-tuh) (Info)
Cultivar: Lemon Star
Additional cultivar information:(PP14371; Sunny series; aka Lemon A-Peel)



Tropicals and Tender Perennials

Vines and Climbers

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Sun Exposure:

Sun to Partial Shade


Grown for foliage

Foliage Color:

Unknown - Tell us


6-8 ft. (1.8-2.4 m)


24-36 in. (60-90 cm)


USDA Zone 10a: to -1.1 C (30 F)

USDA Zone 10b: to 1.7 C (35 F)

USDA Zone 11: above 4.5 C (40 F)

Where to Grow:

Can be grown as an annual



Bloom Color:

Bright Yellow

Bloom Characteristics:

This plant is attractive to bees, butterflies and/or birds

Bloom Size:

Unknown - Tell us

Bloom Time:

Late Spring/Early Summer

Mid Summer

Late Summer/Early Fall

Blooms repeatedly

Other details:

Unknown - Tell us

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:

Unknown - Tell us

Propagation Methods:

From herbaceous stem cuttings

From seed; direct sow after last frost

Self-sows freely; deadhead if you do not want volunteer seedlings next season

Seed Collecting:

Allow seedheads to dry on plants; remove and collect seeds


This plant has been said to grow in the following regions:

Tucson, Arizona

Bellflower, California

Elk Grove, California

Bartow, Florida

Port Saint Lucie, Florida

Atlanta, Georgia

Andover, Kansas

Rolla, Kansas

Malden, Massachusetts

Worcester, Massachusetts

Saginaw, Michigan

Traverse City, Michigan

Minneapolis, Minnesota

Ocean Springs, Mississippi

Hamlet, North Carolina

Barrington, Rhode Island

Conway, South Carolina

Ridgeville, South Carolina

Oliver Springs, Tennessee

Cypress, Texas

San Antonio, Texas

show all

Gardeners' Notes:


On May 8, 2010, RxAngel from Stratford, TX (Zone 6b) wrote:

I have grown this in two different regions...Andover and Rolla, Kansas. It has gone bananas in both areas. Of course it is an annual in both of these regions, and I have not been successful in even finding seeds, much less propagate by seed. I also have not had luck rooting cuttings either, even with rooting hormone. Vigorous, fast-growing vine, yet not invasive (in this area, anyway) with tons of gorgeous yellow flowers that last all day long.

I have noticed while it does like to climb, it also will vigourously vine along the ground, and I believe if several were planted close together, this might make a gorgeous ground-cover, as long as you didn't have other plants or items you would mind covered with the upward growth.

It does well in this area with oth... read more


On May 25, 2005, TNPassiflora from Oliver Springs, TN (Zone 6b) wrote:

Of all the flowers I grew last year, this Black-Eyed Susan Vine was the most outstanding. It was easy to care for and spread quickly over the entire trellis and onto the roof over my carport. I grew it in a 14" diameter pot, in the sun, and watered frequently, though it can tolerate some dryness (just not for an extended period). It bloomed all summer and into the fall before dying in late October (I'm in Zone 6B).

I did note that the literature says it is a self-seeder, but my plant last year produced no seeds at all (I kept looking for them). Could it be that I had a male plant? Does anyone know about the reproduction of these vines? I would love to see a picture of the seeds/pod, if anyone has one.

I have started a new Susan Vine, in an apricot color, f... read more