These are vigorous woody deciduous climbers much valued in gardens because they flower from late summer and on into autumn. In hotter summers the flowers will appear by early July. There are two species; Campsis grandiflora from China and Campsis radicans from SE America.Campsis have the great attribute of producing aerial roots and they are therefore self-clinging on a wall without requiring any specific supports. They will grow equally well up a mature or dead tree where there is enough light for them to develop fully and flower. Similarly they can be trained on a trellis or pillar or over a metal frame. Here however your plants will need to be pruned into shape at the end of each season or in the spring. Campsis can easily produce several flowering shoots of 4-6ft long each season. As you would prune a vine back into shape on its supports so you should constrain, cut back and tie in your selected campsis shoots while removing others completely.