A native of the tropical regions of Madagascar, Africa and Asia, the black-eyed Susan vine, or thunbergia alata, can climb to a height of 20 feet at full maturity. Featuring five orange or yellow petals circling a black or deep-purple center, these plants are popular for cottage-style houses and flower boxes. The vine will grow evergreen if planted properly, keeping your garden or the exterior of your home bright with life and color for most of the year and returning each spring through self-pollination. If the temperature remains above 60 degrees, the flower will bloom all year without interruption.
If you live in an area where the soil temperature does not drop below 60 degrees Fahrenheit, you can plant outside at any time.
Black-eyed Susan vines grow best in Hardiness Zone 10 and higher, according to the Arbor Day Foundation. These zones have an average annual minimum temperature of 40 Fahrenheit and higher.
Do not water the plants after a heavy rainfall.
If you are growing black-eyed Susan vines indoors, they can be susceptible to spider mite and whitefly infestations, as well as scale infections. Check for these problems each time you water the plants, and consult with an expert at a garden center or nursery if these problems arise.