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Campsis radicans or trumpet creeper, is a quick growing, perennial vine that has invasive tendencies. The 3-inch flowers complement deep green foliage that climbs any structure within reach. Campsis radicans thrives when planted in U.S. Department of Agriculture plant hardiness zones 4 through 10, growing to heights of 40 feet with a 10-foot spread.
Prepare a planting site that receives full sun during the day. Select a site that contains well-drained soil with a pH of 3.7 to 6.8. If you do not know the pH of your soil, test it with a soil testing kit purchased from a garden center.
Loosen the soil by turning it over with a pitchfork and amend if necessary. Lime will raise a pH below 3.7 and peat moss will lower a pH above 6.8. The manufacturer's label on the amendment provides application methods and allocation amounts.
Bury the root-balls of the campsis radican seedlings in planting holes that measure 3 inches deep, spaced approximately 5 feet apart. Pat the soil around each seedling to remove air pockets.
- Prepare a planting site that receives full sun during the day.
- Pat the soil around each seedling to remove air pockets.
Water-in the campsis radican after planting. Soak the soil to a depth of 1 inch with a garden hose. Keep the soil moist to the 1 inch depth throughout the growing season with supplemental watering once a week in the absence of rain.
Spread a layer of bark chips around the campsis radican vines to suppress weeds. Weeds will compete with the vines for water, a situation that can inhibit growth. A 3- to 4-inch layer of mulch is all that is necessary to keep the weeds at bay.