What is the correct way to trim wisteria? I have a tangled mess and very few flowers?
Annual pruning will help keep established wisteria in bounds and the plants blooming. Summer pruning helps control growth and promote bloom. Side shoots and laterals (stems growing off the main stems) are pruned back just above the fifth or sixth bud from the main stem. In late winter these same branches are pruned back to within 2 to 3 buds of the main stem. The plant's energy will concentrate here in these buds that will bear the spring bloom. Overgrown vines should be tackled over several years. Severe pruning can results in vigorous growth of leaves and stems but inhibit flowering for several years. So break out the pruners and get started.