Hydrangea macrophylla ‘Cardinal Red’ is a medium-sized shrub, up to 1.5m, with red mophead flowers. On neutral soils, the flower colour is a strong bright red, but on our more acidic soils the red turns to a bright mauve. Whatever your soil type, this compact shrub is very floriferous and gives a magnificent display of colour until mid-September.
Inflorescence: Mophead, 200mm across. Retains blue ‘eye’ regardless of sepal colour.
synonym: H. m. ‘Cardinal’
Zones: 6 to 9
Size: Medium (to 1.5m).
Color in neutral soil:
Color in acidic soil with AI present:
Ray florets: 4 sepals, entire, rounded, overlapping, 35mm diam.
Leaves: Simple, opposite and deciduous. Mid-green. Broadly ovate to broadly elliptic. Margin: serrate. Apex: apiculate. Base: attenuate. Venation pattern: pinnate. Texture of adaxial and abaxial surfaces: smooth, glabrous, quite glossy. 160mm l x 110mm w.