How-to Guide
How to Grow and Control Trumpet Vine
The short answer
Trumpet vine (Campsis radicans) is a native hummingbird magnet with one defining trait: ferocious vigor. Plant it in full sun (it grows fine in shade but flowers poorly there) in lean-to-average soil with regular moisture, on a very sturdy freestanding support well away from the house. Do not fertilize; rich soil just makes it more aggressive.
It blooms on new wood, so the standard regime is a hard prune in early spring before growth starts, cutting stems back to a framework with only a few buds. Containment is the other half of care: the vine spreads by underground runners that send up suckers yards from the parent, and any stem touching soil roots where it lands, so mow or pull suckers promptly, keep growth trained up and off the ground, and deadhead before seed pods form.
Know what you are planting
Trumpet creeper is a large, fast deciduous vine, easily 25-40 feet, that climbs by aerial rootlets and twining, and its folk names (hellvine, devil's shoestring, cow-itch vine) are fair warning about its manners. In its favor: showy orange-to-red trumpet flowers all summer that hummingbirds love, real drought toughness, and native status across much of the eastern and central US.
It is the wrong plant for a small garden, house wall, or anywhere you cannot mow around. It is a good plant for a stout arbor or post in a sunny corner where its suckers can be controlled by regular mowing.
⚠ Keep trumpet vine off houses, wooden fences you value, and trees. Its aerial rootlets and sheer mass are hard on structures, and root suckers will emerge in beds and lawns nearby.
Planting trumpet vine
- 1Full sun for bloom — Foliage tolerates shade, but flowering needs good sun. A hot, sunny site gives the heaviest bloom.
- 2Lean soil, no fertilizer — Average or even poor soil with regular moisture is ideal. Skip fertilizer entirely; rich conditions amplify aggressive growth at the expense of restraint.
- 3Sturdy, freestanding support — Use a heavy arbor, pergola post, or stockade-style structure set away from buildings, and plan mowing access on all sides.
- 4Consider a root barrier — Installing a deep root barrier around the planting area at planting time reduces later runner spread.
Pruning for flowers and control
Trumpet vine flowers on the current season's growth, so aggressive annual pruning costs you nothing in bloom and buys you control. In early spring before growth starts, cut the plant back hard, to near the main framework or even close to ground level, leaving only a few buds per stem. Through summer, keep it growing up and out rather than trailing on the soil, because grounded stems root and become new plants.
Controlling spread
- Mow or hand-pull root suckers as they appear in lawn and beds; steady removal exhausts them.
- Deadhead spent flowers before seed pods mature to prevent seeding.
- Never let stems lie on soil; they root at the point of contact.
- Removing an established vine takes persistence: cut it down and dig or repeatedly remove regrowth from the surviving roots.
Sources
Reviewed 2026-07-18. We cite university Extension, government, and established horticultural sources — and never invent pesticide rates or dangerous treatments.
- North Carolina Extension Gardener Plant Toolbox — Campsis radicans — Trumpet creeper culture: full sun to partial shade with best flowering in sun, lean-to-average soil and regular moisture, vigorous native vine that spreads by runners/suckers and roots from grounded stems, blooms on new stems with hard early-spring pruning recommended, minimal fertilizer because rich soil increases aggression
- University of Illinois Extension — Trumpet Vine — Trumpet vine growth habit, bloom, and management in home landscapes