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Although trumpet vine sends out rootlets for attaching itself to its support, these are not terribly sturdy. High winds or the bulk and weight it develops as it ages may cause it to break away from its support, flopping or breaking apart. As a young vine grows, it is important to fasten it by means of ties of some sort of soft fabric or string to its intended support. Do not use metal staples.
Trumpet creepers do not require routine supplemental watering. Under most circumstances rainfall is sufficient. It is important, however, to water newly transplanted vines generously. Although they are fairly drought resistant, watch trumpet creeper for signs of stress during prolonged periods of drought. When watering, run an irrigation system or dripping hose for 20 to 30 minutes each time, so that the soil is slowly soaked down to 10 or 12 inches. A layer of organic mulch spread at the base of the vine will prevent evaporation of moisture from the soil. For information on products see the file on Choosing Watering Equipment
Feed trumpet creeper once a year in the fall. Sprinkle a handful of fertilizer on the soil at the base of the vine for the rain to soak in. For more information see the file for Fertilizer Products
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A 2 to 3 inch layer of organic mulch spread on the soil at the base of the vine will help retain soil moisture, discourage weeds and protect its long, bare wood stem from accidental injury from yard care equipment. Spread chopped leaves, wood chips, pine needles or something similar out a foot or two on all sides. For more information see the file on Using Mulch
To start more vines from an existing one, take stem cuttings from tender new growth. Dip each cut end in rooting hormone that is available in the garden center and stick them in a pot of soiless potting mix. They will develop roots in a week or two and can be planted in a pot over the winter and outside in the spring.