Hydrangea macrophylla ‘Gartenbaudirektor Kühnert’ is a medium-sized shrub giving excellent blue flowerheads in acidic soil but dity purplish flowers in alkaline soils. Prefers some some shade as flowers may scorch in hot sun.
Inflorescence: Mophead, 160mm across, with flattened corymbs. Good for cutting and drying.
synonyms: H. m. ‘Garden Baudirector Kühnert’ (misspelled).
Bred by Freidrich Matthes, Germany, in 1926.
Zones: 6 to 9
Size: Medium (to 1.5m).
Color in neutral soil:
Color in acidic soil with AI present:
Ray florets: 4 sepals, rounded, entire, overlapping, 40mm 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. 110mm l x 80m.