Togo Thunbergia, Bengal Clock Vine

Thunbergia togoensis

Family: Acanthaceae (ah-kanth-AY-see-ee) (Info)
Genus: Thunbergia (thun-BER-jee-uh) (Info)
Species: togoensis




Tropicals and Tender Perennials

Foliage Color:


Bloom Characteristics:

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

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


36-48 in. (90-120 cm)


4-6 ft. (1.2-1.8 m)


USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

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)

Sun Exposure:

Full Sun

Sun to Partial Shade


Unknown - Tell us

Bloom Color:

Dark Blue

Bloom Time:

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:


Propagation Methods:

From woody stem cuttings

From softwood cuttings

Seed Collecting:

Unknown - Tell us


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

Los Angeles, California

Stockton, California

Big Pine Key, Florida

Ocklawaha, Florida

Sarasota, Florida

Vero Beach, Florida

Winter Haven, Florida

Gonzales, Louisiana

Annapolis, Maryland

Beaumont, Texas

Houston, Texas

Mont Belvieu, Texas

show all

Gardeners' Notes:


On Mar 1, 2012, theplayfulkitty from Winter Park, FL wrote:

The shrub variety shown at the bottom is called Thunbergia Erecta (King's Mantle)


On May 14, 2009, pinke_paints from Houston, TX wrote:

Love this plant! I bought it several years ago in Houston, Texas. It was labelled "Dark Knight" Thunbergia. The photos are confusing as the top 2 clearly show it is a vine with light green leaves and the bottom photo has dark stems and small dark green leaves. I have the same plant as the bottom one.


On Jun 14, 2007, derbeh from Los Angeles, CA (Zone 10a) wrote:

i grew this plant in a courtyard under the partial shade of an australian tree fern. it did very well, and bloomed consistently. the blue was unlike any other i've seen. dark cobalt and neon.


On Jan 18, 2005, PudgyMudpies from Stockton, CA (Zone 9a) wrote:

There is not alot of information available on this rare plant, it is often mistaken for one of the other thunbergia's. It is a beautiful shrub that puts out striking blue flowers that are almost electric or neon in color.
I have grown these for 2 years and have thoroughly enjoyed them. Mine have not gotten more then 3 ft in height, but that could change with age. As they mature and flower on a regular basis, I will update the information.

Edited to clarify for pinke_paints, the top 2 pictures that I posted are NOT vines, they are small shrubs, very erect, the vines and leaves you mention are the vine fence BEHIND this shrub. Sorry for the misconception. In the 3rd picture I posted the leaves of 4 of my Thunbergias that I had growing, that may help you more with l... read more