There are some 50 wisteria varieties available to gardeners, but not all are suited to every garden. If you have a small garden or lack a sturdy structure on which to grow wisteria, substitute a smaller vine, such as Kentucky wisteria (Wisteria macrostachya) or American wisteria (W. frutescens). The Asian species Chinese wisteria (W. sinensis) and Japanese wisteria (W. floribunda) are considered invasive in many areas, especially the East. The American forms are smaller and don't grow as quickly, making them better suited to small gardens. Wisteria can be invasive in the garden and is difficult to get rid of once established. To help restrain the plant's spreading root system, plant it in a courtyard where the roots can't escape into other areas or in a large container that you then place in the ground.