Thanks Marleeney

You should have a deep pot to start with. Wisteria does not follow the same anything really that a normal bonsai does. It have very vigorous roots and loves deep potting. Restricting that growth will not help the tree. Think about it, mine grew up to 6 inches a night, and it has filled a 20 gallon drum in less than 9 months. That tile will be eaten faster than a fat chick and a platter of cupcakes.soltan wrote:Marleeny I think that is a very nice wisteria.
I have not given much thought to styling wisteria yet but if it where mine I would give it free rain to grow for a season before cutting it back any. This will give you time to get a feel for it in flower, I think most of that tree is usable.
It is hard to tell how deep that pot is from the pictures. Unless this is a pretty deep pot I would consider up sizing for a while to increase development. I am not sure why Asus thinks that planting on a flat tile will not help with wisteria so until that was clarified I would suggest a nice big wide pot with the wisteria planted over a tile to encourage lateral root growth to help with more flare at the bottom.