Picture of trumpet vine. Trumpet vine (Campsis radicans) is a climber that produces orange to salmon flowers throughout most of the summer months. Zones 4-9. Provide trumpet vine with an arbor, trellis or fence and let it climb! While it doesn't have to be trained, trumpet vine does need to be pruned back -- for containment purposes. Indeed, in the Southeastern U.S., trumpet vine is sometimes considered a weed. Birdwatchers take note: trumpet vines draw hummingbirds!