Vigorous, deciduous, twining climber. Very floriferous. Wisteria sinensis Caroline can be grown as a standard - in which case allow a central stem of about 4 feet tall to develop and then prune back annually to form an 'umbrella' shape, which will allow the pendant racemes of fragrant flowers to hand down and be dispalyed to best effect.
Wisteria are also very often grown against a wall, or into a pergola and in both cases the secret of success is to train and prune the plant over a few seasons to form a framework of strong and horizontal limbs from which flowering shoots will emerge. Wisteria sinensius 'Caroline' can also be grown into a tree, which is entirely how these plants would survive in the wild - in such a situation regular pruning become pretty much impossible and you simply leave the plant to grow to its fullest extent - the result can be stunning but do chose a sturdy and reasonably large tree.
Wistera sinensis 'Caroline' produces deliciously fragrant racemes of masses of pale bluish-lilac flowers 6-12 inches long from May to June and is one of the earliest to come into bloom - and in our experience plants as young as three years old can produce copious flowers.
The easiest pruning method is to cut back new growth to two buds in early September - this is sufficiently late in the year to prevent a lot of subsequent growth, and so replaces the more traditional method of pruning back to five buds in later summer and then two buds in late winter - here's a great video that illustrates this more old-fashioned technique:
Regardless of the method you use, please don't ignore Wisteria pruning, it is a such a vigorous climber it will soon run out of control!