Campsis are vigorous, deciduous, woody-stemmed climbers, clinging by means of small aerial stem roots.
They are grown for their handsome, ash-like leaves and the bold terminal trusses of orange to red, trumpet-shaped flowers up to 8cm (3in) across, produced on the current season’s growth from late summer to autumn.
Site and soil conditions
Grow Campsis against a warm sunny wall at least 4m (13ft) high. Although hardy, they need shelter from cold winds, and they need full sun to ripen the wood if they are to flower freely. Campsis do well in any moderately fertile, moist but well-drained soil.
Watering and feeding
Campsis generally need little additional feeding unless they are grown in very nutrient-poor soils (such as shallow chalky soil), or in containers. Feed with a general purpose fertiliser such as Growmore or fish, blood and bone, scattered at the base in early spring at a rate of about 70g per sq m (2oz per sq yd). Container-grown plants can be fed with a liquid feed such as tomato fertiliser.
Campsis is fairly drought tolerant, but newly established plants and container-grown specimens should be watered in dry spells. Even well-established plants will perform better if watered during prolonged periods of drought.
Grow in loam based potting compost such as John Innes No 2 potting compost. Multipurpose compost can also be used. Extra perlite or grit may be added to improve drainage.