Wisteria Flowers Forming But Not Opening.
If your Wisteria plant is forming flower buds but they are not opening it most likely to be a nutrient problem i.e a lack of magnesium so try feeding your wisteria in early spring with some liquid tomato feed and also some Epson salts 4 teaspoons to a gallon of water.Both these items contain magnesium.
In addition to this its worth mulching the base of your wisteria with some very well rotted garden or farmyard manure as a mulch.
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