Hydrangea macrophylla ‘Hamburg’ is a strong growing hydrangea with large leaves and large flowerheads.
Inflorescence: Mophead, 200mm across, similar to H. m. ‘Europa’ and ‘Altona’.
Bred by Heinrich Schadendorff, Germany, in 1931
Zones: 6 to 9
Size: Medium (to 1.5m).
Color in neutral soil:
Color in acidic soil with AI present:
Ray florets: 4 sepals, sometimes serrated, rounded, overlapping, 50mm diam.
Leaves: Simple, opposite and deciduous. Broadly ovate to broadly elliptic. Margin: serrate. Apex: apiculate. Base: attenuate. Venation pattern: pinnate. Texture of adaxial and abaxial surfaces: smooth, glabrous, moderately glossy. 200mm l x 150mm w.