Lilac Andenken and Ludwig Spaeth A stunning lilac from the famous Späth nursery in Germany, Syringa vulgaris Andenken and Ludwig Späth is a medium-sized, deciduous shrub with a spreading habit. The heart-shaped leaves are deep green, setting off the flowers wonderfully. Slender spires of deep carmine-purple, fragrant flowers appear in May. This lilac needs minimal pruning, but tolerates hard renovation pruning if necessary. Lilac Andenken and Ludwig Späth holds the RHS Award of Garden Merit. Site: ShelteredSoil: Grows best in moist but well-drained, alkaline to neutral soilPosition: Full sun or partial shadeSeason of interest: Late springHardiness: Fully hardyHeight: up to 13’ (4m) Spread: 13’ (4m) in 10-20 year