What hardiness zones is Hydrangea quercifolia suitable for?

Hydrangea quercifolia is oakleaf hydrangea (oak-leaf hydrangea), a mounding deciduous shrub growing 4-8 feet (1.2-2.4 m) tall and 4-10 feet (1.2-3 m) wide. White conical flower panicles 6-12 inches (15-30 cm) aging to pink then tan-brown in June-July. Dark green deeply 3-7 lobed (oak-shaped) leaves 4-8 inches (10-20 cm). Turns red, burgundy, bronze, and purple in fall. Peeling cinnamon-brown bark on mature stems. In Hydrangeaceae. Native to the southeastern United States — the only Hydrangea species native to North America. Flower color is not affected by soil pH. Blooms on old wood — flower buds can be killed in severe winters in zone 5. This cold bud-kill is the primary limitation in northern zones. Suckers from the base to form a colony. More drought-tolerant once established than H. macrophylla. Compact cultivars: 'Pee Wee' and 'Ruby Slippers' (3-4 feet / 0.9-1.2 m). Deer-resistant. Toxic (cyanogenic glycosides). Zones 5-9. Part shade. Growth rate is moderate.

Native Range

Native to the southeastern United States — Georgia, Florida, Alabama, Mississippi, Louisiana, Tennessee. Found along stream banks, ravines, and bluffs in rich moist forests.

Suggested Uses

Grown as a specimen shrub, foundation planting, woodland garden, mass planting, and in containers of at least 10 gallons (38 L), spaced 4-10 feet (1.2-3 m). Multiseason interest (flowers, fall color, bark). Native to eastern North America. Compact cultivars for small spaces. Deer-resistant. Toxic. Zones 5-9.

How to Identify

Identified by deeply 3-7 lobed (oak-shaped) dark green leaves 4-8 inches (10-20 cm) and white conical flower panicles aging to pink on a mounding shrub with peeling cinnamon-brown bark. The oak-shaped leaf is diagnostic — no other Hydrangea has this leaf form. In Hydrangeaceae.

Appearance

Size & Dimensions

Height4' - 8'

Width/Spread4' - 10'

Reaches mature size in approximately 5 years

Colors

Flower Colors

Foliage Colors

Fall Foliage Colors

red

burgundy

bronze

purple

Bloom Information

Bloom Period

~4 weeks

Summer

Early to midsummer (June-July). White conical panicles 6-12 inches (15-30 cm) of sterile and fertile florets aging to pink then tan. 4 weeks of bloom. Blooms on old wood. Bee- and butterfly-visited. Dried panicles persist through winter.

Detailed Descriptions

Flower Description

White aging to pink then tan-brown, in conical panicles 6-12 inches (15-30 cm) long composed of sterile and fertile florets

Foliage Description

Dark green, large, deeply 3-7 lobed (oak-shaped), 4-8 inches (10-20 cm) long; turns red, burgundy, bronze, and purple in fall

Growing Conditions

Sun Requirements

Partial Shade Full Sun

Requires 3-6 hours of direct sunlight daily

• Full Sun: 6+ hours of direct sunlight

• Partial Shade: 3-6 hours of direct sunlight

• Full Shade: Less than 3 hours of direct sunlight

Soil Requirements

pH Range5.0 - 6.5(Acidic)

357912

Soil Types

loam

Drainagewell drained

Water & Climate

Water Needs

Medium

Frost Tolerance

hardy

Time to Maturity

3-5 years

Drought Tolerance

Drought tolerant when established

Care & Maintenance

Care Guide

Part shade to morning sun (3-6 hours — afternoon shade in zones 7-9). Acidic well-drained soil pH 5.0-6.5. More drought-tolerant than H. macrophylla. Blooms on old wood — do not prune in fall/winter. Flower buds killed in severe zone 5 winters. Suckers to form a colony. Deer-resistant. Toxic. Zones 5-9.

Pruning

Prune after flowering (August) if shaping is needed — blooms on old wood. Remove dead stems at the base. Allow suckering to form a colony or remove suckers to maintain a single clump. The peeling cinnamon-brown bark on mature stems is a feature — do not strip.

Pruning Schedule

summer

Maintenance Level

low

Container Growing

✓ Suitable for container growing

Minimum container size: 10 gallons

⚠️ Toxicity Warning

Toxic to pets and humans