Culture
Winter hardy to USDA Zones 10-11 where it is best grown in fertile, organically rich, medium moisture, well-drained soils in full sun. In St. Louis, grow plants in pots/containers that are overwintered indoors in bright sunny rooms as houseplants. Deadhead flowers to prolong bloom. Prune as needed after flowering.
Noteworthy Characteristics
Tecoma stans, commonly called yellow bells, is native to the West Indies, Florida, and Mexico to South America. It is a broadleaf evergreen shrub or small tree that grows from 10’ to 25’ tall and features a lengthy bloom of bright yellow tubular flowers. It is typically sold by nurseries in the St. Louis area as a container plant for patios in somewhat the same manner as Mandevilla and Bougainvillea. It features odd pinnate medium green leaves with ovate-oblong toothed leaflets (2-4” long). Trumpet-shaped bright yellow flowers (to 2” long) in axillary and terminal racemes bloom continuously from late spring to frost. Flowers are slightly fragrant. Flowers are followed by narrow bean-like capsules (to 8” long) that are filled with papery-winged seeds. Common names for Tecoma stans plants include trumpet bush, esperanza (Spanish for hope), yellow elder, yellow bells or yellow bignonia.
Genus name comes from an abbreviated from the Mexican name tecomaxochitl.
Specific epithet means erect or upright.
GOLD STAR is a cultivar that was discovered growing in a garden in San Antonio, Texas. It is noted for having earlier and larger blooms than native Texas plants. In containers or as an annual, GOLD STAR typically grows 3-4’ tall.
Problems
No serious insect or disease problems. Watch for spider mites and whiteflies on indoor plants. For more information see: Problems Common to Many Indoor Plants
Uses
For the St. Louis area, grow in containers as patio plants that are overwintered indoors. In southern Florida and California, this may be planted as a specimen or massed in gardens and shrub borders or grown in containers.