Question
I have 2 tall Wisteria vines growing up the front of my house. They are at least 50 years old. Each year they grow thick lush leaves but when they flower in the spring there are only a few flowers which last for a few weeks. Is there any to encourage more flowers and less leaves?
Jerry
San Francisco
Answer
Are you pruning these vines back hard each year? Wisteria flower on old wood and you may be cutting away flower buds. When pruning Wisteria, the young, loopy growth can be removed but the flowering spurs on older, 2 year wood should be kept. The flowering spurs are shorter branchlets with visible dark brown flower buds that resemble little almonds. Wisteria do best with little or no feeding. If they are given too much nitrogen, they produce more foliage and fewer flowers.
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