Black Eyed Susan vine, Thunbergia alata, does need to be grown in afternoon shade because we live in a hot, dry climate. It needs well-draining soil rich in organic matter with a neutral pH.

Allamanda requires full sunlight and well-drained soil. Thunbergia, also known as "Clock Vine" or "Black-eyed Susan Vine," is a fast-growing vine that produces vibrant flowers in shades of yellow ...