Wisteria Standards
Hi all
I'd like to try growing a wisteria standard next summer - I can buy one already on a single stem and in a pot around 7L or so, but I'd like to know what kind of support it'd need in it's patio container. Some places say a single strong pole is fine, but others suggest an umbrella-shaped top on it to help it spread, but then some places say the head will be self-supporting. I can give it the perfect sheltered site with loads of sun, but I want to make sure I get the support bit right once it's in it's final pot! Thank you 
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You don't need fancy supports but they are available if you want them. The main stem will need support for a few years as it thickens and strengthens to take the weight of the top growth. You can also grow 2 or 3 stems together and wind them round each other. They will eventually merge into one but give you an interesting twisted stem. There is a link toi mages below to help you.
Whatever you decide, make sure the plant you buy is in flower so you know it will flower for you and the colour too. Seed grown wisteria can take over a decade to get to flowering point. Graft grown ones should be flowering straight away.
Check also the RHS site for info on wisteria cultivation and pruning as it needs doing twice a year to promote flower buds as well as to maintain your chosen shape.
https://www.google.fr/search?q=standard+wisteria%2Bimages&tbm=isch&tbs=rimg:CQ6Hhk9RwuNXIjgKCpp3qZxBV1M2zyC8EFJcg8Vf8f0LVDNG4HYrev5xOiAyOsPqNKCTcbY8gIIsasb0FLsc-_1kUSSoSCQoKmnepnEFXEUJCwn0CT4GsKhIJUzbPILwQUlwRZxJu-AaLqOIqEgmDxV_1x_1QtUMxFTdm-1WvFooioSCUbgdit6_1nE6EdXulKpN6DtMKhIJIDI6w-o0oJMRKxvD0LpC5X4qEglxtjyAgixqxhHKTpr0fm06RyoSCfQUuxz7-RRJEVVVrzvTbr_1t&tbo=u&sa=X&ved=0ahUKEwiymMnE4qnWAhVLuhQKHROOAkcQ9C8IHA&biw=1600&bih=770&dpr=1
Thanks Obelixx, that's all really helpful. Is there anything special I need to use as a support for the main stem? Assuming regular bamboo canes are too flimsy...
Some of those pics of the smaller ones have bamboo canes and you can get really thick ones now but I think I would go for a piece of pressure treated wood that can be bashed in deep and not rot for a few years. 2"x 2" should do it. Tie the wisteria in every 12" or so and use soft ties that can expand and also cross between the stem and the post so there's no rubbing or strangling.