My Dutchman pipe vine that I planted in early March never bloomed this year. Granted it had an auspicious beginning to the growing season with the caterpillars. There was enough time though in the season for the plant to fully recover and fill two trellises 6 feet tall. Essentially, all I have is a 6 x 4.5 foot healthy full green vine but not a one bloom.
The plant is located on the east side of a fence and gets about 8 to 10 hours of sunlight during the summer months. A few questions:
1. Do I need to trim it back for the winter or just leave it?
2. Should I protect the roots with a pile of mulch on top?
3. What suggestions do you have for it to bloom next year?
4. When should I fertilize it?