Answer: Trumpet vine or trumpet creeper (Campsis radicans) is a large vine and can exceed 20 feet of growth in one season once it is established, mature size will reach 35 to 40 feet. It requires a sturdy support. It can potentially smother neighboring plants if allowed to become too heavy and thick where it scrambles over them. In my experience, it is best grown on a post in the center of a lawn area, trimmed back very hard early each spring, and then allowed to form a sort of umbrella shaped whorl. Alternatively it can be allowed to cover a building such as an ugly garage. It blooms on the new growth of the season, so it is best trimmed in late winter; pruning during the summer will remove flowering wood. Having siad all that, the blooms are gorgeous and a well grown plant in full bloom is a sight to behold.
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