Blue Moon Wisteria Growth Rate

Profile

• Blue moon wisteria (Wisteria macrostachya “Blue Moon”) was developed in Minnesota by Harvey and Brigitte Buchite of Hidden Springs Flower Farm, although the cultivar was originally marketed by another nursery. This variety is known for its ability to withstand temperatures as low as -40 degrees Fahrenheit without suffering impaired growth rate or bloom quality. The total range of cultivation for this plant includes United States Department of Agriculture plant hardiness zones 4 through 9.

Characteristics

• In early summer, racemes up to a foot long supporting clusters of highly aromatic, blue, pea-like blossoms first emerge, followed by a second and third bloom before the growing season ends. By fall, the flowers give way to elongated pods that take on a velvety coating when fully ripe. These seed pods, which average 4 to 5 inches in length, often remain on the vine though winter.

Growth Habit

• Like other wisterias, the stems of “Blue Moon” typically form a braid-like central trunk within a few year due to the plant's climbing habit, which is driven by the stems twisting in a counter-clockwise direction as they grow. “Blue Moon” is considered a prolific bloomer and fast grower, with the central vine reaching a total length of up to 25 feet in just a few seasons and a potential spread of up to 8 feet. This variety requires little pruning beyond trimming back stem tips after flowering or in winter.

Culture

• “Blue Moon” wisteria prefers a site in full sun and well-drained, slightly acidic, moist soil enhanced with plenty of organic material. Consideration must be given to location before planting because this vine needs a very sturdy support to grow on and room to spread. Although the plant is fast growing, it can be a bit sluggish to get started. Once established, you can usually expect to see the first blooms in the second or third year, but it can sometimes take longer for flowering to occur.