Closeup of the jumbo lacecap white flowers of White Dome hydrangea A large specimen of White Dome hydrangea in bloom showing its very sturdy stems White Dome hydrangea in winter showing how strong and rigid its stems are White Dome hydrangea in full bloom growing near a brick wall YouTube video describing the plant shown on this page
photo of Woulter Kromhout - Darthuizer Nursery

Meet the Breeder

Woulter Kromhout - Darthuizer Nursery
Leersum, Netherlands

WHITE DOME®

Hydrangea - Smooth

Hydrangea arborescens

'Dardom'

USPP 14168

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Closeup of the jumbo lacecap white flowers of White Dome hydrangea A large specimen of White Dome hydrangea in bloom showing its very sturdy stems White Dome hydrangea in winter showing how strong and rigid its stems are White Dome hydrangea in full bloom growing near a brick wall YouTube video describing the plant shown on this page
  • Strong stems
  • Native to North America
  • Attracts pollinators
Description

White Dome® is useful as a mass planting or incorporated into a woodland setting. It's a great alternative to ornamental grasses to add winter interest to a landscape. Largely trouble-free, it has very strong stems and few pests or diseases.

USDA Zone 3 - 8 (-40°F/-40°C)

icon visually displaying the size and shape of this plant variety

Exposure Full sun, Part sun

Height 4 - 6'

Width 4 - 6'

Finish Time 1 season

Type Deciduous

Bloom Time Summer

Flower Color White

Foliage Color Green

Soil Grows well in most soils; avoid wet and poorly drained sites. Mulch is recommended in the landscape.

Pruning Blooms on new wood - cut back by about one-third its total height in early spring, just as the new growth begins to emerge on the stems. Smooth hydrangeas may be cut back harder, however, this prevents woody cells from developing, prohibiting the plant from achieving its maximum stem strength.

Uses Versatile and showy, smooth hydrangeas offer dozens of landscape applications: foundation plantings, perennial gardens, hedges, cut flower gardens, naturalizing, pollinator and wildlife gardens.

Growing Tips We recommend full sun for smooth hydrangeas in the cooler end of its hardiness range; afternoon shade is a good idea in warmer climates, however. The flower color of smooth hydrangeas is not influenced by soil chemistry. Makes an excellent cut flower, both cut and dried.