Hydrangea macrophylla ‘Rotdrossel’
synonyms: ‘Red Wing’, ‘Teller Red’
Bred by the Federal Research Institute for Horticulture, Wädenswil, Switzerland, in 1987.
Hydrangea macrophylla ‘Rotdrossel’ is one of our top hydrangeas due to its intensely coloured lacecap flowerheads in either dark red or purple.
Inflorescence: Lacecap with large flowerheads,190mm across, brilliant dark red to purple-red.
Colour in neutral soil: Dark red
Colour in acidic soil with Al present: Reddish-purple
Ray florets: 4 large sepals, slightly dentate. 70mm diam.
Zones: 6 to 9
Size: Large (to 2m).
Leaves: Simple, opposite and deciduous. Broadly ovate to broadly elliptic. Margin: serrate. Apex: apiculate. Base: attenuate. Venation pattern: pinnate. Texture of adaxial and abaxial surfaces: smooth, glabrous, moderately glossy. 170mm l x 160mm w.
The photo on the left is of a two-year-old plant still getting established. Twelve months later, with its roots now fully developed and capable of absorbing aluminium from our slightly acidic soil, the flower colour has changed to a reddish-purple.