Question
I have a wisteria vine. It barely blooms and produces just leaves. I want to thin it out to bloom. Will that help?
Larry
Rio Vista
Answer
Dear Larry,
If you're pruning your Wisteria each fall or winter, you may be pruning off the flowering wood. Wisteria only blooms on old wood. It is recommended that only the long, looping tendrils be cut back. Flower buds can be seen as largish, oyster shell or triangular shaped "scales" on the older wood behind these newer growths.
Another reason for a lack of bloom is over-feeding. Your Wisteria can get by without any feeding at all. Really! Your thought about opening the vine up with the chance of providing more sun can be done, but again, you may be removing flowering wood without knowing it, and pruning out the older wood will result in a large flush of new growth in the spring.
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