It is always better to plant in the garden!, it,s going to be there for quite a while, and it doesn,t need repotting at regular intervals, thus avoiding root disturbance, plus once it,s established it wont need as much watering as it would in a pot. derekm

Almost everything would prefer to be in the garden, except possibly, annual bedding plants that don't get such big root systems and can cope for just a season in containers. Every other plant is better off in the ground, provided the pH of your soil is suitable for it.

i agree with the others but a good idea is to get big planters and cut the bottem out of them so they look like there in pots but benefit from sending there reoots wear they want .

Wisteria does very well in large pots - you'd need to pot on yearly until its in an enormous container, probably by the time its 5 years old, and you'd need to be rigorous about pruning, usually training it up an upright post in the centre, no easy thing to do in smaller containers.