Hydrangea aspera ‘Macrophylla’ (Japan)
(= H. aspera ssp. strigosa)
Habit: Small to normal shrub, 1-2 m tall and wide; usually without branches, but dense and thick shoots, looks stiff, medium to fast-growing.
Flowers: Large blue to reddish cymes, up to 20 cm across, marginal flowers white or pink, July to August.
Leaves: Slenderly ovoid to lanceolate, saturated green, 35 cm across, soft hairs, no autumn colours.
Demands: Light shade to semi-shade, for cool, humid areas, moderately sensitive to frost, regenerates well; needs wind protection.
Soil: Very acidic to neutral, humic substrates, fresh to moist.
Note: Cut back to 15-30 cm in March/April to further flower production that year.
Hardiness: Zone 6