Trumpet vines are aggressive climbers that can grow upward of 50 feet if given adequate support and care. Their trumpet-shaped flowers bloom during the summer months with the most common varieties blooming orange flowers, although other cultivars produce yellow and red ones. Trumpet vines are quite hardy and easy to maintain, so they need little care to prepare them for winter.
Water the trumpet vine one last time in the fall before the winter freeze. Water it well with 1 inch of water. Do so midday when both the air and soil temperatures are still above 40 degrees Fahrenheit.
Remove any of the debris under the trumpet vine. Rake up dropped flowers, leaves and anything else. Otherwise, it may be a haven for winter creatures, such as slugs and rodents.
Apply 3 to 4 inches of mulch in U.S. Department of Agriculture zone 4 in areas where snow coverage, which insulates the soil, is not reliable. Zone 4 is the coolest zone where trumpet vines are hardy, so if you experience an unusually cold winter, mulch will help keep the soil warm.
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