Hydrangea macrophylla ‘Hanabi’

synonyms: ‘Shooting Star’, ‘Fireworks’, ‘Vuurwerk’, ‘Feu D’Artifice’, ‘Sumida no Hanabi’.  Some consider ‘Fuji Waterfall’ to be a synonym of ‘Hanabi’.

Discovered and named by Takeomi Yamamoto, Japan, in 1960.

Hydrangea macrophylla 'Hanabi'

Hydrangea macrophylla ‘Hanabi’ is a vigorous shrub, sometimes exceeding 2.5m. It differs from all other varieties of hydrangea by its extraordinary flat inflorescences measuring up to 250mm. These lacecap flowers comprise double ray florets and double true flowers, all of which can be white, pale pink or pale blue depending on soil conditions.

If placed is a shady position with insufficient sun we have found H. m. ‘Hanabi’ reluctant to flower.

Inflorescence: Lacecap, 250mm across. Very confused flower with leaves growing from the peduncles and some ray florets appearing amidst the fertile flowers.The pendulous double ray florets dangle from long pedicels. The true flowers are also double.

 

Colour in neutral soil:                           White with pink true flowers.
Colour in acidic soil with Al present:     White with pale blue true flowers.

AGM Award of Garden Merit

Hydrangea macrophylla 'Hanabi'

Ray florets: 12-14 sepals, entire, slightly acuminate, overlapping, 40mm across.

Zones: 6 to 9.
Size: Tall (to 2.5m).

Hydrangea macrophylla 'Hanabi' leaf

Leaves: Simple, opposite and deciduous.  Broadly ovate to broadly elliptic.  Margin: serrate.  Apex: apiculate.  Base: attenuate.  Venation pattern: pinnate.  Texture of adaxial and abial surfaces: smooth, glabrous, moderately glossy. 140mm l x 60mm w.