Pruning back stems approximately 2 months after it flowers and again in the winter, when the plant is dormant. The seeds are dispersed by water. Root pruning of Wisteria may limit the vines ability to take up nitrogen and thus encourage flowering rather than foliage growth. Add two or three dowel rods between the cuttings. This way, as new shoots pop up and it grows to that height, you will get nice new shoots the following spring. In the summer, pruning your wisteria should be done about two months after it flowers. After Wisterias have bloomed, some of the flowers will produce brown seed pods 6 to 9 inches long. Don’t worry about over pruning. Let the tendrils grow until July and then cut them back. Consult a pruning guide for specifics on the initial training of vines and the types of pruning that can or should be done for these high maintenance plants. To avoid over-watering, water only when the top inch of soil feels dry. She received her Bachelor's degree from West Virginia University. Pruning wisteria can be done to overgrown wisteria as well. The key to pruning Wisteria is to prune them at least once a year and preferably twice. This is alright. Regularly pruning the shoots helps to keep the plant at a manageable size. When buying wisteria, look for … When pruning roots, only prune dead roots if possible. Pruning keeps the growth of the sprawling Wisteria under control. This is the best time to prune your wisteria because the leaves and flowers have not grown back yet after falling off during the fall. Just be mindful of cutting away any buds unless it’s necessary to the tree’s shape, and be careful about knocking the buds off by accident. The other way to reduce the amount of nitrogen a wisteria plant is getting is to root prune the plant. It's important not to prune your Wisteria in Winter because like other spring flowering shrubs, if you do, you'll simply cut off all that seasons' flowers. Pruning live ones will again encourage more green growth rather than flowering. Pruning and wiring: Hard pruning is best done in early spring or after flowering. Training as standards. Missouri Botanical Garden: Wisteria brachybotrys 'Shiro-kapitan', University of Vermont Extension: Rooting Cuttings, Royal Horticultural Society: Cuttings: Softwood, Royal Horticultural Society: Cuttings: Hardwood. Wisterias flower on new growth and pruning encourages more stems to sprout on the plant. Using root pruning as a way how to get a wisteria to flower reduces the amount of roots and, by default, the amount of nitrogen those roots take up. Pruning: Wisteria requires regular pruning to control the size and shape of the plant, as well as to encourage flowering. ... as they have big hungry root systems. Find more gardening information on Gardening Know How: Keep up to date with all that's happening in and around the garden. The wisteria can fix nitrogen from the atmosphere and too much nitrogen would promote leaf growth instead of flowers. Place the planter in a warm location with filtered sunlight; avoid direct sunlight. Wisteria Wisteria is usually grown as a vine, but it may also be grown as a tree, shrub or groundcover. The dowel rods support the plastic bag above the cuttings, allowing room for growth, and helping to retain moisture in the perlite mixture. A former cake decorator and competitive horticulturist, Amelia Allonsy is most at home in the kitchen or with her hands in the dirt. WATCH: Why We Love Wisteria This can take several weeks. Extensive pruning during fall and winter can keep your wisteria under your control. 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. A Wisteria plant should be pruned only twice a year: in summer, and then again … When you grow something as beautiful as the wisteria, you don’t want to ruin it by pruning it wrong. Make the cuts 4 feet away from the base of the main trunk and push the spade blade about 18 … Water the cuttings as needed to keep the soil moist, but not wet. Fear not! If the vine still does not bloom, you may have to stress the plant by root pruning it. Prune wisteria in late winter. Sign up for our newsletter. Water the potting mixture until evenly moist, but not wet. It will not kill the plant. This may or may not be true, but might be worth trying. Plan your wisteria’s first pruning of the year around late winter. After pruning wisteria, you will find that your wisteria trimming may have caused some larger branches to die back. Now look at that Medusa-like tangle of branches, twigs, and runners you call wisteria. 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