White oak (Quercus alba) — Plotwright

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White oak

Habit (mature) · Dcrjsr / Wikimedia Commons · CC BY 4.0

Limited coverage

White oak

Quercus alba

A long-lived native deciduous canopy tree of eastern North America with rounded crown, deeply lobed leaves, and one of the highest documented Lepidoptera-host counts of any North American native tree (oaks support 500+ butterfly and moth species per Doug Tallamy). Acorns are sweet (edible after leaching) and the foundation forage of the eastern hardwood food web — woodpeckers, blue jays, wild turkey, deer, and black bear all rely on the mast. Plants for centuries, not decades.

Native: 36 US states + 2 CA provinces

Review: Source-backed

Climate fit: broad (90/100)

Focal point

Structure

Light

Full sun / Part shade

Water

Moderate water

Mature size

600-1080" tall · 600" apart

Hardy in zones

3a-9b

brutally cold to frosty winters

Summer heat range

Cool-Hot

cool to hot summers Interim Plotwright tier until the plant AHS range is authored.

Native in Illinois

Yes

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A documented larval host for the Imperial moth and 1 other species — caterpillars feed on its foliage before becoming the next generation.

Wildlife relationships

Cold hardiness

Now

Zone 6b

USDA

Chicago, IL · 1991-2020 average annual coldest day

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

Well-suited

2050

Zone 7b

Plotwright

Your zone + climate-model shift · SSP3-7.0 (regional rivalry)

Well-suited

In plain terms: cold winters — coldest nights typically around -3°F.

✓

Well-suited today and still thriving in 2050.

Heat tolerance

°C

°F

Loading current AHS heat-zone and plant heat-fit data at your coordinates…

Where this plant fits

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

Appalachian mixed mesophytic forests

Appalachian-Blue Ridge forests

Arizona Mountains forests

Atlantic coastal pine barrens

Blue Mountains forests

Canadian Aspen forests and parklands

Central Pacific Northwest coastal forests

Central Tallgrass prairie

Central-Southern Cascades Forests

Chilean Matorral

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.

Sources & citations

Cite this page

For lesson plans, articles, or research that uses this page. To cite a single upstream fact instead, use its specific source listed below.

Plotwright. (2026, May 17). White oak (Quercus alba). Retrieved 2026, June 5, from https://plotwright.garden/plants/white-oak

Sources for every fact

Every fact on this page traces to a source. 18 fields cited — 18 source-backed.

NC State Extension Gardener Plant Toolbox

University extension service

Backs 17 fields

Identity

Summary

Plant type

Light

Moisture

Hardiness

Heat zone

Size

Spacing

Habit

Design roles

Seasonal interest

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Wikimedia Commons

Photo · CC BY 4.0

Backs 1 field

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