There was a great feature on Gardeners World last Friday 8th May about wisteria standards with expert advice. Catch up? Re avoiding white, avoid anything with Alba in the name as this is Latin for white. Re OP ungrafted wisterias do have significant problems with flowering. That's why they are grafted. To avoid long term disappointment get a grafted one. pruning advice: 7 and 2. Prune to 7 buds in the seventh month, July, and 2 buds in the second month, Feb.
@Jason-3 I think quite a lot probably all the floribunda and sinesis wisterias are suitable to grow as a standard. Have you watched the last episode of gardeners world ?
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Re avoiding white, avoid anything with Alba in the name as this is Latin for white.
Re OP ungrafted wisterias do have significant problems with flowering. That's why they are grafted. To avoid long term disappointment get a grafted one.
pruning advice: 7 and 2. Prune to 7 buds in the seventh month, July, and 2 buds in the second month, Feb.