12 yr old wisteria set blooms and failed to grow and flower, no leaves either. Scraped a branch and is green under bark, so not dead. What can I do to make it grow leaves?
Certified GKH Gardening Expert
Most of the country has experienced a colder than usual spring. If this is the case where you live, it is possible that the cold killed the blooms and is delaying the plant from leafing out. As long as it is still green, I would give it a little more time.