Campsis radicans – Trumpet Creeper, Trumpet Honeysuckle, Trumpet Vine
(= Bignonia radicans; Tecoma radicans) (south-eastern North America)
Habit: Climbing roots/self-adhesive, 6-10 (15) m tall, 6-10 m wide, dense mats; wide and loosely overhanging twigs at the top; initially slow-growing, after 3-5 years fast-growing, 150-300 cm a year.
Flowers: Splendid, orange-red, trumpet-like flowers, 4-6 cm long, in numerous, loose clusters of 7-9; from July to the beginning of September; not fragrant; cutting the last year’s shoots back to a few buds in spring furthers the production of flowers.
Fruits: Rare; elongated capsules like cigars; olive-green, unpalatable.
Leaves: Pinnate, 7-13 lateral leaflets, ovoidly pointed; late shoots in mid or end of May, reddish green, dark green in summer; yellow-green or yellow in autumn from mid or end of September on.
Roots: Shallow, fleshy root system, resistant to floods and soil compaction and moderate covering, but needs to be planted carefully.
Demands: Full sun is best for the development of flowers, shady to semi-shady areas also possible but with far fewer flowers; tolerates heat, needs warmth, moderately frost hardy, low to high humidity, resistant to urban and industrial pollution.
Soil: Dry to very moist, slightly acidic to very alkaline, prefers well drained, sandy-gravelly or sandy-loamy substrates, also possible in heavy soil but more sensitive to frost.
Our tip: As the suckers are only formed on the internodes, i.e. where the leaves develop on the shoot, some 20-40 cm apart, the twigs are not as perfectly attached to the wall as with ivy. To help them climb, crossways climbing aids should be set up to prevent the shoots from being ripped off smooth walls by heavy rain, storms, or ice.
Hardiness: Zone 6b