Campsis

Campsis is a genus of flowering plants in the family Bignoniaceae, comprising vigorous climbing vines native to temperate regions of the Americas and Asia. The best known species are Campsis radicans, commonly called trumpet vine or trumpet creeper, and Campsis grandiflora, the Chinese trumpet vine; hybrids such as Campsis x tagliabuana are also grown in cultivation. Plants are woody and twining, with pinnate leaves typically bearing 7 to 15 serrate leaflets. From mid to late summer into autumn, Campsis produces large terminal panicles of trumpet-shaped flowers, usually orange to red and 2 to 4 cm long, highly attractive to hummingbirds and bees. After flowering, seed capsules develop and split to release seeds.

Taxonomy and species: In addition to C. radicans and C. grandiflora, the genus includes several cultivars and hybrids developed for varied flower coloration and size. The plants are valued in gardens for rapid vertical growth, long flowering periods, and strong nectar production, though they require substantial support and space.

Distribution and ecology: Campsis radicans is native to eastern North America, while Campsis grandiflora is native to southeastern China. Both have been widely cultivated and have escaped cultivation in some regions. In parts of Europe and other temperate areas, C. radicans is considered invasive, capable of forming dense stands that crowd out native vegetation and complicate management. The genus is generally a vigorous grower, and removal can be challenging once established.

Cultivation: Trumpet vines prefer full sun and well-drained soil, though they tolerate a range of conditions. They climb by twining stems and require sturdy support. Pruning after flowering helps control size and stimulate new wood flowering. Propagation is by semi-ripe cuttings, layering, or seed, with cultivars commonly propagated vegetatively to preserve traits.