Wisteria

Wisteria sinensis ‘Amethyst’ – This Chinese Wisteria is a New Zealand introduction and features fragrant two-tone flower clusters of violet-blue (with reddish undertones) that emerge from May to June, with an occasional light repeat bloom in late summer. The new leaves emerge with a bronze tint, maturing to green. Twines counter-clockwise. Grows 20-30′ high. Zone 5.

Wisteria macrostachya ‘Aunt Dee’ (syn. Wisteria frutescens var. macrostachya) – This cultivar of Kentucky Wisteria begins blooming at a young age, bearing 8 to 12″ long racemes of pale lilac-blue flowers (lightly fragrant) from late spring into early summer. This native of the southeast United States is reported to tolerate wet soils better than other Wisteria. Height 15-25′. Z4.

Wisteria sinensis ‘Blue Sapphire’ – Another of the Chinese Wisterias that twines in a counter-clockwise direction. The fragrant flowers emerge an intense violet-blue (in May-June), fading to a lovely pale violet, and lightly repeat later in summer. New growth is bronzed. Be careful not to over-fertilize young vines as this will result in few flowers. Grows 20-30′. Zone 5.

Wisteria floribunda ‘Snow Showers’ (syn. ‘Shiro Noda’, ‘Longissima Alba’) – This Japanese Wisteria is an RHS Award of Garden Merit winner with fragrant white flowers (often with a hint of lilac) held in racemes up to 16″ long. Wisteria require both summer (July-Aug.) thinning and winter (Jan-Feb) pruning. Twines in a clockwise direction. Grows 25-30′ high. Zone 5.

Wisteria macrostachya ‘Blue Moon’ – Another of the Kentucky Wisteria and one of the hardiest selections available for colder regions. It bears pea-like lavender blue flowers from mid to late spring and often repeats – these are followed by 4-5″ long bean-like pods.  Many gardeners have had success growing it in sheltered zone 3 sites. Ultimate height 15-25′ high. Zone 4.

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