Hydrangea macrophylla 'Nikko Blue’ is very floriferous with beautiful pale blue mopheads, but needs afternoon shade to prevent scorching of flowerheads.
Inflorescence: Very numerous, tight, bright pale blue mopheads, 150mm diam.
Originated in Japan. Introduced to the West before 1970.
Zones: 6 to 9
Size: Medium (to 1.5m).
Color in neutral soil:
Pale pink, but not recommended
Color in acidic soil with AI present:
Ray florets: 4 sepals, entire, overlapping, 40mm 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. 170mm l x 110mm w.