Hydrangea macrophylla ‘Blauer Prinz’ is best when grown as a ‘blue’ by adding aluminium sulphate.
Inflorescence: Mophead, 160mm across, small round flowerheads are in direct proportion to the size of this shrub.
synonym: H. m. ‘Blue Prince’
Bred by F. Matthes, Germany, 1925.
Zones: 6 to 9
Size: Medium (to 1.25m).
Color in neutral soil:
Color in acidic soil with AI present:
Ray florets: 4 sepals, slightly pointed, entire, overlapping, 60mm diam.
Leaves: Simple, opposite and deciduous. Broadly ovate to broadly elliptic. Margin: serrate. Apex: apiculate. Base: attenuate. Venation pattern: pinnate. Texture of adaxial surface: coarse; and abaxial surfaces: smooth; glabrous, leathery. 148mm l x 85mm w.