'Amethyst Falls' American Wisteria has fragrant, short bluish lavender flowers from June to August on current season's growth. It reblooms sporadically throughout the summer. It tolerates wet sites, and works well on pergolas. Introduced by Bob Head of Head-Lea Nursery.
'Nivea' American Wisteria has fragrant white flowers on short racemes in June and July and reblooms sporadically. Less showy but much less aggressive than the Chinese Wisterias. 'Nivea' was reportedly discovered in the wild by Mary Gibson Henry, founder of Pennsylvania's Henry Foundation. Since Wisteria is a legume, its root system fixes atmospheric nitrogen, enabling it o establish and grow well even in the poorest soil.