To accomplish this, simply prune the long shoots of the current year’s growth back to 6 inches long in early summer after the vines have flowered. Since wisteria flowers develop on the previous year’s growth, pruning wisterias biannually not only keeps these vigorous vines to a manageable size but also creates a system of short branches close to the structure, where you can more easily enjoy the blooms. After pruning: The long shoots of new growth have been pruned back to 6 inches to keep the vine in check and to create short branches that will give rise to next year’s blooms. Summer: Cut the long shoots after flowers fadeīefore pruning: In early to midsummer, the flowers have faded and the long vegetative shoots that grow on the main framework of the vine have become unruly. Living without windows is not for everybody, but with some initial planning and a commitment to regular pruning, no one has to. Knowing how the vine grows will also aid in your success. For optimal results, plan for at least a biannual (once in summer, once in winter) pruning regimen. But for the gardener who has limited space and wants to enjoy more visible and abundant wisteria flowers, a pruning routine becomes a necessary chore. Wisteria can live a long, healthy life with no pruning at all, happily twining, climbing, and sprawling over everything in its path. Yet for all its rampant behavior, a wisteria in full bloom is one of the loveliest sights. Covering a three-story building is no challenge for some vigorous wisteria vines, which are able to grow 10 feet or more in a single season. The apartment itself wasn’t memorable, but the building was: The entire brownstone was encased by an impenetrable mass of wisteria, windows and all. For that reason, you should plant it with care and only where it is permissible to do so.While searching for my first apartment in Brooklyn, I was shown a one bedroom on a quiet, tree-lined street. You should also be aware that purple wisteria is an invasive species in many parts of the United States. Pruning this plant multiple times each year is the best way to keep it under control. Without close attention, this plant can quickly expand and begin to compete with other plants in your garden. The key to growing purple wisteria is controlling its growth. The best way to prevent those issues is to plant your wisteria in an ideal location and give it the care and growing conditions it needs. Scale, borers, and aphids are among the insects that can use purple wisteria as a host. When growing this plant, you’ll also need to watch out for infestations. Purple wisteria can also experience mineral deficiencies and may respond poorly to excessive amounts of nutrients. Regarding disease, canker is most common. Problems with both disease and pests can arise with purple wisteria. Don’t be afraid to take off too much, as this plant responds well to hard pruning and will bounce back with plenty of new growth. Pruning is needed if you want to keep purple wisteria under control. When you prune, remove any branches that are diseased or that show other signs of distress. You should prune your purple wisteria at least twice per year, once in winter and once in the summer - more often if needed. When you do, use a fertilizer with plenty of phosphorus, as that is the micronutrient that influences flowering the most. If you choose to fertilize yours, do so once per year. ![]() Overall, purple wisteria does not need a lot of fertilizer. Once your plant is older, it will need much less water and will be somewhat drought-tolerant at times. At that time, it may be necessary for you to give water about once every three days. ![]() You’ll need to water your purple wisteria regularly during its initial growth stage. Then you can train it to climb that structure and take on its most impressive form. In nearly all cases, you’ll want to plant this species near some sort of garden structure. The location you choose should also have some wind protection, as this plant’s early flowers can be susceptible to a late-season winter storm. ![]() That added light will help this plant develop its flowers. While it will survive in partial shade conditions, it is better for purple wisteria to grow where there are at least six hours of sunlight per day. By John Haryasz | Horticulture Writer and Landscape Designer – last update on February 22, 2022
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