Regarded as one of the best purple lilacs, award-winning Syringa vulgaris 'Andenken an Ludwig Spath' is an upright, deciduous shrub with slender panicles, up to 12 in. long (30cm), packed with amazingly fragrant, single, deep wine-red flowers. Blooming in late spring, the abundant blossoms last 3-4 weeks and make a dramatic display. The erect, open branches are clothed in dark green, heart-shaped leaves that remain attractive in summer.