Cold hardiness

Future

2050

2100

These values are location-based: this location's current hardiness is the baseline, and the 2050 value is a projected future climate for this same location.

Now

Zone 6b

USDA

Published baseline for this location from 1991-2020.

Source: USDA Plant Hardiness Zone Map 2023 (1991-2020 climatology) via ArcGIS FeatureServer

Well-suited

2050

Zone 7a

Plotwright

Projected zone for this same location in 2050 (2041-2070) using SSP3-7.0 (regional rivalry).

Well-suited

In plain terms: This location is in Zone 6b today. Its hardiness profile is cold winters, and coldest nights are typically around -3°F. By 2050, the projected hardiness zone is Zone 7a based on SSP3-7.0 (regional rivalry). That is a +0.5-zone shift from Zone 6b to Zone 7a by 2050.

✓

Well-suited today and still thriving in 2050.

Heat tolerance

Future

2050

2100

Heat tolerance values are location-based too: heat days today are observed at this site, and the 2050 value projects this same location under a future climate.

Loading AHS heat-zone data for this location...

Where this plant fits

Suitable across 41 ecoregions — 40 climate-resilient through 2070 · 1 suited today. Best matches first.

Appalachian mixed mesophytic forests

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Appalachian-Blue Ridge forests

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Arizona Mountains forests

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Atlantic coastal pine barrens

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Blue Mountains forests

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Canadian Aspen forests and parklands

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Central Pacific Northwest coastal forests

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Central Tallgrass prairie

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Central-Southern Cascades Forests

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Chilean Matorral

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What it needs

Conditions

Light

Full sun / Part shade

Water

Moderate water

Spacing

600"

Habit

Broad rounded long-lived deciduous canopy tree with a strong central trunk

Care tips

•

Site permanently and far from structures — at 80-100 feet mature, white oak is a tree for parks, large yards, and naturalized woodland, not for narrow lots.

•

Protect young saplings from deer browse with a 5-foot tree tube or fencing for the first 2-3 years; oaks are heavily preferred forage.

•

Water deeply through the first 3-5 seasons while the taproot establishes; once mature, white oak is fairly drought-tolerant per NC State.

Lifecycle

Planting

Plant in spring or fall in coarse, deep, moist, well-drained, loamy, slightly acidic soil per NC State. Site permanently — the deep taproot makes white oak difficult to transplant once established. Avoid wet sites; choose a large open area away from structures, pavement, and compaction.

Transplanting

Transplant only when very young (1-2 gallon stock or bare-root saplings). NC State: "deep taproot makes it difficult to transplant." Older trees rarely move successfully.

Early growth

Water deeply through the first 3-5 seasons while the taproot drives down. Mulch a wide ring without touching the trunk. Protect from deer browse with a tree-tube or fencing for the first 2-3 years.

Maturity

Mature trees reach 80-100 feet tall and wide, often persisting 200-300 years in favorable sites. Acorns appear by year 20+; mast years (heavy acorn production) recur every 4-10 years. The crown becomes broad and rounded with branches reaching toward the ground in open-grown specimens.

Propagation

Acorns germinate immediately upon falling (no dormancy); plant in autumn where you want the tree. Stratified seed germinates the following spring. White oak does not sucker or layer effectively; seed is the only practical propagation.

Pollination

Wind-pollinated

Monoecious — both male catkins (greenish-yellow pendulous chains) and female flowers occur on the same tree. Wind-pollinated; no insect pollinators required. White oaks do not hybridize with red oaks but freely cross with other white-oak-group species (Q. macrocarpa, Q. bicolor, etc.).

Plants don't grow alone

Larval host

Moth

Polyphemus moth (Antheraea polyphemus)

Larval host

Moth

Imperial moth (Eacles imperialis)

Imperial moth (Eacles imperialis) larvae feed on Quercus canopy through summer; one of the giant silk moths declining across the eastern range due to light pollution. Planting oaks is the canonical conservation action.

Fruit forage

Bird

Eastern songbirds (multi-species) (multiple species (Passeriformes))

NC State: "The acorns are eaten by woodpeckers, blue jays, small mammals, wild turkeys, white-tailed deer, and black bear." Mast years (heavy acorn production every 4-10 years) drive eastern forest population cycles for many species.

Seed forage

Mammal

Eastern gray squirrel (Sciurus carolinensis)

Shelter / habitat

Bird

Black-capped chickadee (Poecile atricapillus)

Shelter / habitat

Bird

Downy woodpecker (Dryobates pubescens)

For people

Edible with preparation

White oak acorns are among the most palatable of the oaks — sweet rather than tannin-bitter, with reduced leaching required compared to red oak acorns. Indigenous peoples across eastern North America used acorn flour as a staple carbohydrate. NC State: "edible to humans after tannins are leached or boiled out." Modern foraging requires proper leaching technique; do not consume raw.

Edible parts

fruits

Culinary use

Acorn flour for breads, mush, and traditional Indigenous preparations after cold-water or hot-water leaching to remove tannins. White oak acorns require less leaching than red oak acorns (lower tannin content).

Traditional medicinal use

NC State documents historical Native American medicinal use of acorns. Modern internal use is not established and should not be inferred from traditional use.

Native range

Native across 36 US states + 2 CA provinces.

AHS heat range

1-11

Native ecoregions

Naturally belongs in 21 ecoregions — its native range crosses a state or province each one spans (not necessarily this exact habitat).

Appalachian mixed mesophytic forests

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Appalachian-Blue Ridge forests

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Atlantic coastal pine barrens

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Central Tallgrass prairie

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Chihuahuan desert

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Cross-Timbers savanna-woodland

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Eastern Canadian Forest-Boreal transition

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Eastern Great Lakes lowland forests

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Edwards Plateau savanna

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Flint Hills tallgrass prairie

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Climate notes

•

NC State Extension lists Quercus alba for USDA hardiness zones 3a-9b across the eastern United States and southern Canada (Ontario and Quebec).

•

Fairly drought-tolerant once established per NC State, but young trees need consistent moisture through the first 3-5 seasons while the taproot establishes. Sensitive to soil compaction and not suited to wet sites.

•

Susceptible to oak wilt (a serious vascular disease in some regions), anthracnose, cankers, and various leaf spots. Insect pressure rarely material per NC State; orangestriped oakworm and tussock moth occur but are usually self-limiting.

In the designer

Growth over time

600-1080" tall · 600-960" spread

Mature canopy phase begins; lifespan extends 200-300+ years.

Design roles: Focal point · Structure

Seasonal interest

Spring

Summer

Fall

Winter

Filled = the plant has seasonal interest · ▾ now = your current season

White oak

At a glance

Related products

Why it matters

Cold hardiness

Heat tolerance

Where this plant fits

What it needs

Lifecycle

Pollination

Plants don't grow alone

For people

Native range

Climate notes

In the designer

Seasonal interest

Sources & citations