Question: I have a trumpet vine that has been growing for three years now. It has lots and lots of leaves and climbing vines, but so far no flowers. How can I get it to produce flowers?
Answer: Trumpet vines like moderately fertile, well- drained soil, yet they are able to tolerate poor soil and restricted roots. It is best to prune thein the late winter or early spring, and it may take three seasons for them to ‘establish’ themselves. Where they are marginally hardy, it is best to grow them in a protected area (against a wall) in full sun. Though most trumpet vines are hardy in Zones 5-9, the Chinese Trumpet Vine is hardy in Zones 7-9.