Hydrangea serrata ‘Kiyosumi’ is a small plant, rarely achieving 1m in height.
Inflorescence: Lacecap, 104mm across, with purple fertile flowers surrounded irregularly with two-tone ray florets.
Discovered on Mount Kiyosumi, Chiba province, Japan. Bred by Yasaka Hayasha, Japan, in 1950.
Synonym: H. serrata 'Kiyosumisawa'
Zones: 6 to 9
Size: Small (to 0.85m).
Color in neutral soil:
White and red ray florets, purple fertile flowers
Color in acidic soil with AI present:
White and red ray florets, purple fertile flowers (no change)
Ray florets: 4 sepals, rounded, almost entire, 45mm diam.
Leaves: Brown-red when new, ageing to russet green, 120mm l x 55mm w.