Hydrangea arborescens is a southeastern U.S. native shrub with a rounded habit to 5 feet tall and domes of creamy white flowers over a long period beginning in early summer. The cultivar ‘Grandiflora’ has larger, showier flowerheads than the species. They grow to 6 to 8 inches across.
CareSmooth hydrangea is good for grouping a few plants in the lawn or in a mixed shrub border, and prefers shade from midday sun. It blooms on current season's wood throughout the summer, and is best pruned to 6" high in early spring.
PropagationSow seed in a cold frame in spring; take softwood cuttings in early summer, hardwood cuttings in winter.
ProblemsGray mold, slugs, powdery mildew, rust, ringspot virus, leaf spots.
- Genus : Hydrangea
- Zones : 3, 4, 5, 6, 7, 8, 9
- Plant Height : 3 to 6 feet
- Plant Width : 3 to 6 feet
- Tolerance : Frost Tolerant
- Light : Full Sun to Partial Shade
- Maintenance : Low
- Moisture : Medium Moisture
- Growth Rate : Moderate
- Characteristics : Showy Seed Heads
- Plant Type : Shrubs
- Bloom Time : Summer
- Plant Seasonal Interest : Summer Interest
- Flower Color : White
Plant Characteristics are only available to Fine Gardening members
Sign up for a free trial and get instant access to our complete plant guide as well as our entire collection of articles and videos.