Posted: 08/02/2015 at 17:48
If you take them from a wisteria that's vigorous growing they are usually ok and also taken from one that has flowered as well otherwise if you take them from one that hasn't flowered you can wait years for them to flower. Sometimes you can buy a rogue one that may never flower. I have a customer that's had one for ten years and it's still not flowered once. I have only looked after that one for two years though and it's only been correctly pruned by me but not flowered yet. So if you buy one buy it in flower or just after grafted as Welsh said or take cuttings from a flowering one.