Smooth Hydrangea (Hydrangea arborescens 'Grandiflora') in the Hydrangeas Database

Common names:
Give a thumbs up Smooth Hydrangea
Give a thumbs up Wild Hydrangea
Give a thumbs up Sevenbark
Give a thumbs up Hydrangea

General Plant Information (Edit)
Plant Habit: Shrub
Sun Requirements: Full Sun
Full Sun to Partial Shade
Partial or Dappled Shade
Water Preferences: Wet Mesic
Soil pH Preferences: Neutral (6.6 – 7.3)
Minimum cold hardiness: Zone 5a -28.9 °C (-20 °F) to -26.1 °C (-15 °F)
Maximum recommended zone: Zone 9b
Plant Height: 3 to 5 feet
Plant Spread: 5 feet and suckers wider
Leaves: Deciduous
Flowers: Showy
Blooms on new wood
Flower Color: White
Bloom Size: 5"-6"
Flower Time: Summer
Suitable Locations: Patio/Ornamental/Small Tree
Resistances: Flood Resistant
Propagation: Other methods: Cuttings: Stem
Stolons and runners
Pollinators: Other: none or very little
Miscellaneous: Tolerates poor soil


Photo gallery:

Posted by ILPARW (southeast Pennsylvania - Zone 6b) on Jul 6, 2019 2:36 PM

This Hills of Snow Hydrangea is the old-fashioned hortensia or mophead cultivar of the Smooth Hydrangea that has rounded flower clusters of almost all showy, infertile florets about 6 to 8 inches across; very few fertile florets for any pollinators. I don't see this once very popular cultivar very much anymore in the Midwest or Mid-Atlantic USA as it has been replaced by the very popular cultivar of 'Annabelle' that has larger, more symmetrical clusters around 12 inches across. I still have a copy of the Countryside Book called "Home Landscaping" from 1984 that has a photo of this plant on page 60. This best selling book of full color plant photos was one book I used in my old landscape design class in the early 1970's to see what plants looked like.

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