Campsis Bignone

The Campsis or trumpet vine is a vigorous climbing plant perfect for quickly covering your vertical structures. Choose Campsis radicans for its exceptional hardiness down to -20°C, ideal for all French regions. Campsis grandiflora offers larger flowers but requires a milder climate.

For a sunny exposure, prioritize varieties with bright orange flowers like 'Flamenco'. For striking contrast, opt for scarlet red flowering varieties. These climbing plants thrive on pergolas, trellises, or against a south-facing wall. Plan for sturdy support as trumpet vines can reach 8 to 10 meters in height.

Origin and botanical characteristics

The Campsis, commonly called trumpet vine or Virginia jasmine, belongs to the Bignoniaceae family. Native to North America and Asia, this climbing plant stands out for its spectacular tubular flowers and decorative compound foliage. The flowers, grouped in terminal clusters, bloom from July to September and naturally attract hummingbirds and butterflies.

Optimal growing conditions

Trumpet vine thrives in full sun in well-drained soil, even if chalky or poor. This remarkably tolerant plant withstands drought once established and resists salt spray. Regular watering in the first year promotes rooting, then it becomes self-sufficient. Rapid growth, up to 2 meters per year, requires annual pruning in late winter to control development.

Planting and maintenance

Plant your trumpet vine in spring or fall, digging a hole twice as wide as the root ball. Install a sturdy support immediately as woody stems become very heavy. Compost application in spring stimulates flowering. Pruning involves shortening previous year's shoots to 2-3 buds of the main framework.

Landscaping uses

Exceptional for vertical greening, trumpet vine transforms pergolas, arbors and façades into spectacular flowering displays. It suits Mediterranean, contemporary or natural gardens perfectly. Combined with ornamental grasses or summer-flowering perennials, it creates dynamic and colorful compositions.

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What exposure does a trumpet vine (Campsis) need?

Trumpet vine requires full sun exposure to flower well. It tolerates partial shade but flowering will be less abundant. A south or southwest-facing location is ideal.

How to prune a trumpet vine (Campsis)?

Prune in February-March by shortening previous year's shoots to 2-3 buds of the framework. Remove dead wood and branches straying from the support. Severe pruning stimulates flowering.

Is Campsis cold-hardy?

Campsis radicans resists down to -20°C once established. Young plants may need winter protection in the first years. Campsis grandiflora is less hardy, tolerating -10°C.

How long before a trumpet vine flowers?

A trumpet vine planted from a pot generally flowers in the 2nd or 3rd year. Older specimens or grafted plants may flower in their first year after planting.

How do you attach a trumpet vine to its support?

Use flexible ties to attach young shoots without damaging them. Trumpet vine develops natural rootlets but initial guidance is necessary. Regularly check support stability.

Does trumpet vine attract insects?

Yes, trumpet vine flowers attract bees, butterflies and other pollinators. It's an excellent melliferous plant that contributes to garden biodiversity without causing nuisances.

Can you grow trumpet vine in a container?

Possible but tricky since trumpet vine needs space for its roots. Use a very large pot (100L minimum) with sturdy support. Watering and nutrient applications must be more frequent.