The climbing trumpet or trumpet flower (Campsis) impresses with its lush growth and large, brightly colored flowers. The plant needs sun and nutrient-rich soil, otherwise it is quite easy to care for. However, not all species and varieties of the trumpet vine are hardy.
Campsis radicans is hardy down to -15°C
Winter hardiness depends on species and variety
There are basically three different types of trumpet vine, with only the American trumpet vine (Campsis radicans) and the great trumpet vine (Campsis tagliabuana), a hybrid, being hardy for temperatures between - depending on the variety - - 15 °C and -20 °C. The Chinese trumpet climber (Campsis grandiflora), which is also not suitable for planting out in the garden, is much more sensitive and therefore not hardy.
Hardy trumpet flowers
In the following table we have put together some hardy trumpet vine varieties for you.
| variety | kind | blossom | heyday | growth height | hardiness |
|---|---|---|---|---|---|
| flava | Campsis radicans | yellow | July to September | 300 cm | to - 15 °C |
| Stromboli | Campsis radicans | Red | July to October | 400 cm | to - 15 °C |
| flamenco | Campsis radicans | Red | July to October | 600 cm | to - 15 °C |
| Madame Galen | Campsis tagliabuana | scarlet | July to September | 400 cm | to - 20 °C |
| Indian summer | Campsis tagliabuana | orange | July to October | 300 cm | to - 20 °C |
Overwintering Trumpet Climbing
With the exception of young, not yet lignified trumpet vines and the Chinese trumpet vine, which is not hardy, you can easily overwinter trumpet flowers outdoors. It is important that the plants have a sheltered location and are protected from very cold temperatures with a layer of leaves and/or brushwood. Young trumpet vines only develop their resistance to cold with age - the more woody they are, the less sensitive they are. Chinese trumpets, on the other hand, should hibernate in a cool but frost-free place in a cold house - winter in a heated living room is not advisable; temperatures between 10 and 12 °C and a bright spot are ideal.
tips
Don't be surprised if your trumpet flower doesn't seem to sprout in spring: the first leaves come out quite late after the winter break, usually not until May.