Monitor the soil moistness around the trumpet vine 4 to 6 inches deep. If the soil is dry, water the trumpet vine.
Provide an inch of water per week, preferably early in the morning using a soaker hose directly onto the soil when rainfall isn’t adequate. Watering deeply once a week will promote a healthy root system.
Apply a 3-inch layer of mulch, such as shredded cedar shavings, around the trumpet vine to maintain the moistness of the soil.
Water lightly in the fall months. Water sparingly during the trumpet vine’s first winter if you live in a dry climate as recommended by the Easy to Grow Bulbs website.