Description
Small, dense, upright deciduous shrub (H 1,2-1,5 m, W up to 1,5 m). Leaves broadly egg-shaped (15-20 cm), with a roughly toothed margin, smooth, dark green. Flowers in round inflorescence (15-20 cm), only large, sterile flowers, bright blue, light blue, lilac. Very freely flowering; mostly on last-year growth. Flowering period: July-September. The flower-colour tends more toward the blue on acidic soils and more toward the violet-pink on alkaline soils.