Smooth hydrangea (Hydrangea arborescens) is a small, multi-stemmed deciduous shrub native to the eastern United States, grown mainly for its large white flower heads. Cultivars such as 'Annabelle' and 'Incrediball' are the forms most often grown in gardens.
Family
Hydrangeaceae (Hydrangea family)
Grows as
Shrub
Light
Part shade
Water
Keep soil consistently moist, especially in dry spells and in the first season after planting.
Soil
Moist, humus-rich, well-drained soil; it grows naturally in mesic woodland soils.
Temperature
Hardy in cold winters (roughly USDA zones 3 to 9); tolerates typical temperate winter cold without protection.
How easy
Easy
Safety
Toxic to cats and dogs (ASPCA).
Native range
NC. & E. U.S.A.
Climate
temperate
About
Hydrangea arborescens, commonly known as smooth hydrangea or sevenbark, is a species of flowering plant in the family Hydrangeaceae. It is a small- to medium-sized, multi-stemmed, deciduous shrub up to 2 m (7 ft) tall that is native to the eastern United States.
Where it grows
Smooth hydrangea is widely distributed across the eastern United States—from southern New York to the panhandle of Florida, west to eastern Oklahoma and southeastern Kansas. It is mainly found in mesic soils under the canopy of deciduous forests and is frequently found along small water courses and on woodland road waysides. It is common in the Delaware River Valley and in the Appalachian Mountains.
Uses
This attractive shrub is often cultivated for ornamental use. In the UK the cultivar 'Annabelle' has gained the Royal Horticultural Society's Award of Garden Merit. The cultivar 'Grandiflora' has inflorescences which resemble snowballs, similar to Viburnum opulus 'Roseum'.
Text excerpted from the Wikipedia article Hydrangea arborescens by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.