Black-eyed Susan Vine
(Thunbergia alata)

Plant Description:

A native to tropical East Africa, this twining vine makes a beautiful addition to container gardens and landscapes with its colorful flowers that appear from late spring through fall.  It also provides quick cover for a lattice or chain link fence.  Many cultivars and hybrids are available, having yellow, orange, white or pinkish flowers, usually with dark centers.   Although a perennial in South Florida, here in North Florida and other areas of the U.S., it is grown as an annual.  Plants can be started from seed each year, or grown in containers and protected from the cold during winter. 


Ornamental Characteristics & Uses:

Foliage Color:    Medium Green

Flower Color:     Yellow, Orange, White, Pink

Bloom Time:      Late Spring – Fall

Attracts Wildlife:  Not especially attractive to wildlife.

Uses:  Grown in containers or in the landscape with support structure.


Growing Requirements:

Cold Hardiness Zone(s):     9b – 11

Exposure:     Partial Shade – Full Sun      

Water Needs:     Moderate to High

Soil Tolerances: Low drought tolerance; prefers well-drained, sandy-loam soils

Soil pH:    Slightly Acidic to Slightly Alkaline

Maintenance:   Moderate


General Care & Growing Tips:

This plant does not perform well in intense heat, preferring morning sun and afternoon shade.  Plant in well-drained soil, enriched with organic matter and maintain a 2- to 3-inch layer of organic mulch to help retain soil moisture.  Light applications of a slow-release fertilizer may be beneficial for increased growth and flowering, but over-fertilization should be avoided as this may result in excessive growth with fewer flowers.  


Common Pests:

Watch for spider mites and whiteflies.  No diseases are of major concern.


What’s in a name?   
Don’t confuse Black-eyed Susan Vine (Thunbergia alata) with Black-eyed Susans (Rudbekia spp.), the herbaceous annuals/perennials with daisy-like flowers.  When comparing the two plants side-by-side, you should notice that they are quite different, but common names are often confusing which is why each plant is given one unique name, referred to as the scientific name.



Wichman, T., Knox, G., Gilman, E., Sandrock, D., Schutzman, B., Alvarez, E., Schoellhorn, R., and Larson, B. (2006). Florida-Friendly Plant List.  Florida Yards and Neighborhoods Handbook.  University of Florida.


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