The Q&A Archives: Pruniny Trumpet Vines

Question: Have Purchased Monrovia Balboa Sunset Trumpet Vines which I would like to prune and train to climb and cover a purgula. How can I recognize which canes to cut, and when should I prune. I'm getting conflicting information from the nursery from which the vines were purchased. The vines were purchased and planted this spring, and seem to be rooting nicely.

Answer: Campsis radicans blooms on the new growth of the season, so for best flowering you would prune in early spring. (Summer pruning will reduce flowering.) This plant will scramble upward on a trellis to the top of your pergola and then grow across the top. You could prune it back to the top of the post each spring, this will encourage branching at that point and help it create a thicker canopy across the top. This vine grows somewhat slowly the first couple of years while it develops its root system. After that it is a rampant grower reaching about 30 feet so it should have no trouble covering your pergola. I hope this helps.

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