Hydrangea macrophylla ssp. serrata 'Blue Billow’ is a free-flowering small shrub suitable for a shady border. It is a compact lacecap with broad, light blue flowers and dense green foliage. The leaves adopt autumn colours of deep red in late summer.
Inflorescence: Lacecap, 130mm across, with large but delicate light blue corymbs.
Introduced by the Dupont family gardens in Philadelphia
Zones: 6 to 9
Size: Medium (to 1m).
Color in neutral soil:
Color in acidic soil with AI present:
Ray florets: 5-6 sepals, slightly serrated, overlapping, 30mm across.
Leaves: Simple, opposite and deciduous. Broadly ovate to elliptic. Margin: serrate. Apex: acute. Base: obtuse. Venation pattern: penninerved. Texture of adaxial and abaxial surfaces: glabrous on both surfaces, matte on the upper surface. Size: 150mm l x 75mm w.