How to Get Wisteria to Bloom

Опубликовал Admin
24-09-2016, 04:25
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With proper care and frequent pruning, wisterias will produce a brilliant showing of lilac-colored blossoms year after year. However, wisterias can be reluctant to bloom for many reasons, including improper pruning and fertilizing, or they simply may not be old enough yet. It may take several years for your wisteria to start blooming, but once it does, it can produce blooms for 40 years or more. This article explains how to get wisteria to bloom.


  1. Prune wisteria by cutting back new shoots to about 6 inches (15.24 cm) in mid-July to early August after flowering has stopped. Thin the plant out well, leaving only 1 or 2 buds per branch. Keep the strong, healthy branches that have buds or nodes at their bases and get rid of any branches that are hanging downward or otherwise spoiling the shape of the plant.
    • Consider pruning back damaged branches in late winter. You can also hack the root system at the same time, with a shovel or axe, to shock the plant into flowering.
  2. Use a pruning saw to cut back older, woody stems all the way to the ground, leaving at least 3 to 4 stems per wisteria plant.
  3. Prune any branches that are crossing or rubbing against the main stem of the plant since these branches will not produce flowers and will detract from the shape and beauty of the plant.
  4. Tie wisteria branches to a trellis or other support structure so that the main stems are generally growing horizontally rather than vertically. Stems should grow horizontally for at least 5 feet (1.52 m) before growing vertically. Make sure that stems are not allowed to grow downward.
  5. Prune wisteria again after all danger of frost has passed in the spring. Cut back side shoots to 2 to 3 inches (5.08 to 7.62 cm), making sure each shoot has 2 to 3 flower buds.
  6. Fertilize wisteria with superphosphate following the instructions on the packaging immediately after spring pruning. Use 10-10-10 twice a year.


  • Wisteria responds best under stress. Use fertilizer sparingly and do not overwater.
  • Plan to give wisteria a major pruning every 3 years or so to help it keeps its shape.
  • Wisteria need full sun and moist, well-drained soil to blossom. They also prefer a sheltered location such as against the brick wall of house to protect them from the harshest winter winds.
  • When left untended, wisteria can grow into a tangle of branches in a single season, encroaching on nearby plants and putting excess pressure on its trellis or other support structure. Prune the plant heavily to the desired size and shape, thinning overcrowded stems. New shoots will begin to grow quickly. Select the most vigorous of the new growth and begin training them to grow along wires, a trellis or up a tree.
  • Force wisteria to grow horizontally by making pruning cuts on down-facing buds.


  • Do not use high-nitrogen fertilizer around wisterias, including lawn fertilizers, because the nitrogen will encourage leafy growth rather than flower blooms.

Things You'll Need

  • Mature wisteria that has bloomed in the past
  • Pruning shears
  • Pruning saw
  • Plant ties
  • Superphosphate
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