Black Eyed Susan Vine Care - Tips For Growing A Black Eyed Susan Vine

Sometimes referred to as Thunbergia, black eyed Susan vines are used to adorn trellises, attract pollinators, and brighten otherwise drab garden spaces. A native of Africa, flowers grown in frost-free regions will behave as a short-lived perennial. However, their quick growth makes them an ideal candidate for annual beds, as well.

Caring for Black Eyed Susan Vine

Stems and leaves are green and flowers are usually a deep yellow, white or orange with black centers. There are also red, salmon and ivory flowered varieties. Black eyed Susan is a fast growing vine that needs a vertical stand or trellis to support the plant. The vines twine around themselves and anchor the plant to vertical structures.

Light Conditions

When it comes to black eyed Susan vine, plants will grow best under full-sun conditions. This means that they should receive at least 6-8 hours of direct light each day. Vines can be grown in beds that are shaded, though they won't grow as long or flower as profusely.

Temperature and Humidity

Black eyed Susan vines thrive where conditions remain warm. Before planting outdoors, make sure both day- and night-time temperatures remain consistently above 50F (10C). Soils should also have been allowed to warm sufficiently, to at least 60F (15C). Though adaptable to a wide range of humidity, plants may struggle where weather is especially dry.

Watering Needs

Routine watering will aid in growth as well as the production of flowers. Make sure to saturate plants deeply, at their root zone. Avoid overwatering, as vines won't tolerate beds that are excessively wet.

Fertilizing

Though optional, applications of a well-balanced fertilizer can be used to promote bloom. Vines should be fed early, before the production of buds. Routine fertilization can continue every 4-6 weeks. You should avoid over-feeding, though, as it can result in excessive leafy growth and diminished flowering.

Soil and Compost

Black eyed Susan vines grow best in warm, well-amended beds. The plants are adapted to a wide range of soil conditions, including those that are neutral, slightly acidic, or slightly alkaline. Finished compost and other amendments can be added at planting time, as needed, according to the specific needs of one’s own space. Good drainage is essential, with vines thriving where soils remain consistently moist.

When and How to Plant Black Eyed Susan Vine

Growing black eyed Susan vine from seed is a quick and easy way to add seasonal beauty to the home landscape. Seeds are best sown in spring. Though they can be started indoors, most prefer to sow them directly into the garden. This can be done after all chances of frost have passed and the soil has warmed sufficiently. Black eyed Susan vine seedlings should begin to emerge in as little as 5-7 days from planting. Vines will start to heighten within the first few weeks, requiring support to continue their climb.

Supporting and Training Black Eyed Susan Vine

Black eyed Susan vines climb by twining. This means that the best supports for the plants are those which it is able to spiral up. Examples of such supports include various types of garden twine, trellises, arbors, and stakes. As plants can reach impressive heights, supports should be secured well and able to easily hold the weight of mature vines.

Black Eyed Susan Vine Pruning

Black eyed Susan vines are relatively carefree and require only little pruning. In fact they'll continue blooming throughout the season without the need for deadheading. Though large plants can be trimmed or pruned to control their size, it is not needed to promote new growth or the production of flowers.

Problems, Pests, & Diseases

Black eyed Susan vines only seldom have issues with pests or disease. That doesn't mean they're problem free, though. Powdery mildew is most common, but can be controlled by the removal of infected leaves and/or use of various treatments. Watch for pests like whitefly, scale or mites and combat with horticultural soap or neem oil.

How to Propagate a Black Eyed Susan Vine

You can grow a black eyed Susan vine from seed.

Growing a black eyed Susan vine from cuttings is easier. Overwinter the plant by cutting several inches from a terminal end of a healthy plant. Remove the bottom leaves and place in a glass of water to root. Change the water every couple of days. 

Once you have thick roots, plant the start in potting soil in a pot with good drainage. Grow the plant until spring and then transplant outdoors when temperatures warm up and there is no possibility of frost. 

Best Black Eyed Susan Vine Varieties

• ‘African Sunset’ Black eyed Susan Vine - Consisting of yellow-blush blooms, ‘African Sunset’ is praised for its delightful color and unyielding ability to cover obelisks and trellises. This is an excellent black eyed Susan vine for containers.
• ‘Bright Eyes’ Black eyed Susan Vine - ‘Bright Eyes’ is sure to make a statement. With pristine white flowers, this cultivar stands out among the most unique types of black eyed Susan vines available to home gardeners. Its high contrast makes it an attractive addition to mixed borders and hanging baskets.
• ‘Sunny Susy Amber Stripes’ Black eyed Susan Vine - Like most varieties, ‘Sunny Susy Amber Stripes’ offers an array of brilliantly-colored flowers. Lush foliage and red-orange blooms make for an attractive groundcover that is well-suited to a warm garden palette.
• ‘Superstar Orange’ Black eyed Susan Vine - Producing among the largest blooms of any variety, orange flowers put on a vibrant display throughout summer. ‘Superstar Orange’ is an exceptionally popular choice for pollinator gardens and for those hoping to attract hummingbirds.

Frequently Asked Questions