Illustration
White Oak
Quercus alba
Also called american white oak, eastern white oak, northern white oak and quebec oak
White Oak blooms from April through May.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing White Oak
Plant it in full sun. It prefers moderate water. It is hardy in USDA zones 3–9. Expect it to reach about 65 ft tall and 65 ft wide at maturity, in roughly 12 years (a house reading).
Is White Oak toxic to dogs?
- Listed as toxic to dogs by Royal Horticultural Society.
- Not yet checked for cats.
- Listed as poisonous to people by NC State Extension.
Lists differ and none is complete. If a pet eats a plant and seems unwell, call a veterinarian or a pet poison helpline.
What was checked
Nine facts were checked against named botanical sources, each recorded beside the sources that carried it: mature height and spread, hardiness zones, sun, water, bloom months and color, the trait tags, and years to mature size, which rests on a recorded house rule where no publisher states one and is marked so. Soil, diseases, pests, toxicity and the plant's own names have not yet been read for this plant, and its trait tags are the ones a feature uses rather than every word a page prints. Each fact above carries its own mark. The planting, spacing and size sections are derived from these checked facts by a fixed rule, not checked separately, and the plant type is the library's own classification.
When to plant White Oak
Plant White Oak in early spring as soon as the soil is workable, or in early fall at least six weeks before your first frost, so roots establish in cool weather. In zone 6, the middle of its hardy zones 3 to 9, spring means March to May and fall means August or September. Once settled, it blooms from April to May.
Month-by-month timing for your zone is on the planting calendar; if you garden near zone 6, the middle of this plant's hardy range, start with zone 6 in March. Derived from the plant's category, zones and bloom months plus typical zone frost dates, not checked separately.
How big does White Oak get?
65 fttall5 ft 7 inan adult65 ftwideSee White Oak in a garden plan: the planner shows it in 3D beside everything else you add, growing toward this size over the years.
How far apart to plant White Oak
Derived from the mature spread above by a fixed rule, not checked separately: spacing is the spread, center to center.
Give White Oak about 65 ft of clear ground in every direction, measured from its center. It is one plant with room around it, not a row, and a raised bed is too small for it.
Add White Oak to a garden plan and the planner draws it at its full width, so you see the spacing before you buy.
Where these facts come from
White Oak's height, spread, hardiness zones, sun, water, bloom months and color and trait tags were checked against 9 published sources on October 19, 2026. Each one is linked below with every fact it carried, which can include a fact this page still marks as not yet checked, because a source carrying a value is not the same as the value being held to the standard. Facts not in that list, and the planting, spacing and size sections, are not covered by these sources.
- Missouri Botanical Gardenheight, spread, hardiness zones, sun, water, bloom months and color and trait tags
- NC State Extensionheight, spread, hardiness zones, sun, water, bloom months and color and trait tags
- The Morton Arboretumheight, spread, hardiness zones, sun, water, bloom months and color and trait tags
- bcarboretum.orgBoone County Arboretumheight, spread, sun and water
- Chicago Botanic Gardenhardiness zones, sun and bloom months and color
- nursery.ohiodnr.govOhio Department of Natural Resources, Buckeye State Tree Nurseryheight, spread, sun and water
- RHSRoyal Horticultural Societyheight, water and bloom months and color
- Missouri Department of Conservationheight and bloom months and color
- University of Illinois Extensionheight and spread
How the checking works, and what each standard covers, is on the verified plants page.
Where it grows wild
Native to 35 states and 2 provinces
United States: Alabama, Arkansas, Connecticut, Delaware, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Nebraska, New Hampshire, New Jersey, New York, North Carolina, Ohio, Oklahoma, Pennsylvania, Rhode Island, South Carolina, Tennessee, Texas, Vermont, Virginia, West Virginia, Wisconsin and 23 more
Recorded growing wild in 1,458 counties.
Range data from the World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 4.0, adapted) and USDA PLANTS. How the native range is credited.
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Design a garden with this
Drop this plant onto a 3D plan, see how it fills in, and watch your whole garden bloom across the year.