Vigorous climbers used for large-scale effects, quick summer screens. All bear radiant, orange-toned blossoms shaped like flaring trumpets, in clusters at branch tips, midsummer to fall. Glossy leaves are divided into 212-in., ovate leaflets. Stems have aerial rootlets that cling to wood, brick, stucco, and other surfaces. Unless pruned and tied to supporting surface, old plants can become top heavy and pull away. Each dormant season, shorten some branches and thin others. Pinch back shoot tips in summer to keep plants bushy. Plants spread by suckering roots; pull any that appear. If older plants become unmanageable, cut to ground before spring growth begins and train a few strong new stems.
C. grandiflora. CHINESE TRUMPET CREEPER. Zones MS, LS, CS; USDA 7-9. Not as vigorous, large, or hardy as the American native C. radicans, but flowers are slightly larger and redder. Each leaf has up to nine leaflets. Grows to 30 ft. under ideal conditions. 'Morning Calm' has peach- colored flowers.
C. radicans. COMMON TRUMPET CREEPER. Zones US, MS, LS, CS; USDA 6-9. Native to eastern U.S. Each leaf has up to 11 leaflets. Flowers are 3-in.-long orange tubes with scarlet lobes flaring to 2 in. wide. Grows fast to 40 ft. or more, bursting with health and vigor. 'Flamenco' features red trumpets with orange centers. 'Atomic Red' flowers are solid deep red. 'Indian Summer' has large blooms in shades of yellow-orange with red centers; it is a more restrained grower than the species. Flowers of 'Judy' are rich golden yellow with a red throat. C. r. flava has pure yellow blossoms and somewhat lighter green leaves.
C. xtagliabuana. Zones US, MS, LS, CS; USDA 6-9. Hybrid between above two species. 'Madame Galen', best-known selection, has salmon-red flowers. 'Crimson Trumpet' bears pure red blooms. Those of 'Hot Lips' are a bright reddish orange.