Bees and butterflies love the lavender-blue, nectar-rich flowers of Lilac 'Katherine Havemeyer'. Gardeners love this shrub too, for its graceful hanging flower clusters, delicious fragrance, heart-shaped leaves, and because it is such an easy shrub to grow and maintain. Syringa vulgaris grows quickly in a sunny spot and attracts many beneficial insects to the garden. Height: 7m (23'). Spread: 7m (23').