The flowers of Thunbergia (Black-Eyed Susan) have an almost pop art look to them, with a solid center surrounded by a ring of clear colored petals. The vines grow quickly, once the temperature warms up. They will tangle themselves around the nearest support or spill over edges. They are perfect for hanging containers, but flow just as easily over walls and raised beds. With their quick growth habit and sprawling nature, Thunbergia vines can overtake nearby plants and are often grown as solo performers.
This plant likes a fairly neural, of around 6.5 and a soil rich inorganic matter. The Thunbergia vine is quick growing and repeat blooms throughout the summer. That means they will get hungry and will need a light feeding every 4 – 6 weeks, with a complete fertilizer to keep it growing strong.
Although the vines don’t like sitting in wet soil, they also don’t like being hot and dry. Mulching around the base of the plants will keep the roots cool and moist, without fear of rotting.