Wisteria usually become very large plants - I cannot imagine why a label would say 60 cms, several meters would be more like it. They are grown often on very firm wires across the front of a house or on a wall. A trellis would have to be very heavyweight to take the weight of the plant and its flowers once it starts to flower. Amethyst Falls I believe can have trusses of flowers up to 15 - 18 inches long, so you can imagine how big the plant is going to get. It is true that you can grow them in a large tub and train them as a tree shape, but I know nothing about how that is done. Don't expect flowers in the immdediate future, this is another lovely plant with which you need to be patient, it will need to settle and grow the roots which will be big enough to support the plant - it will need good feeding and careful pruning as well, to get the best from it.
My friend has a beauty which grows over 2 sides of her house - all from one plant - and it flowers gloriously - but it is BIG, so please be prepard for that.
There are some very good books and websites devoted to the growing of wisteria, which you may find infirmative. I do not have one, but I know the pruning is essential for good flowering. Have fun and enjoy.