'Amethyst Falls,' like other Wisteria, is a strong grower, reaching 30 feet or more. It is, however, not invasive like its Asian cousins. This native variety is less vigorous and easier to manage, refraining from choking out trees over time, as some Wisteria want to do - a distinct advantage in the South, where Wisteria can run wild! All of these things make it an ecologically sensitive choice. 'Amethyst Falls' flowers sooner than the Asian types (some of which can take 10 years or more), blooming its first season with fragrant, vividly purple flowers on 4- to 6-inch racemes that appear in spring and repeat all summer. Its bloom also arrive about two weeks later in the season than others, so late-winter frosts seldom affect flowering. The many attributes of 'Amethyst Falls', which include its deer and drought tolerance and its disease-resistant foliage, earned it a Georgia Gold Medal in 2006. This gorgeous vine is a perfect choice for pergolas, trellises, fences, arbors, and containers, attracting butterflies to your garden all summer long. It can also be trained as a free-standing tree - tie it to a sturdy 5- or 6-foot stake and prune the top to encourage branching.
Pruning should occur in late winter to shape and remove any undesirable growth. Another light trim after the first flush of flowers will improve branching and produce an encore bloom.