Shingle Oak (Quercus imbricaria) - How to Grow & Care Guide

Plant Snapshot

Common Name: Shingle Oak
Latin Name: Quercus imbricaria
Hardiness Zones: USDA zones 5–9.
Typical Height: 40–70 ft (12–21 m).
Typical Spread: 40–50 ft (12–15 m).
Bloom Period: Spring (catkins).
Soil Preferences: Well drained loam to clay. Tolerates dry, rocky or upland soils. Prefers slightly acidic to neutral pH.
Light Preferences: Full sun to part shade.
Toxicity: Acorns and foliage contain tannins that can be toxic to livestock and may cause gastrointestinal upset in pets if eaten in quantity. Not typically a handling hazard for people but acorns are astringent unless processed.
Propagation: By seed using acorns. Nursery grown seedlings and grafting are used for selection propagation.

Key Facts

Deciduous oak native to eastern and central North America.
Leaves are entire and unlobed giving a shingle like appearance.
Produces small acorns that are an important wildlife food.
Prefers well drained upland soils and tolerates drier sites.
Used as a shade tree and occasionally for timber.
Flowers as catkins in spring before or with leaf out.
Growth rate is slow to moderate compared with other oak species.

Shingle Oak (Quercus imbricaria) is a medium to large deciduous oak prized for its smooth unlobed leaves and steady production of small acorns that feed wildlife. It prefers well drained upland sites and performs best in full sun to part shade while tolerating drier soils that limit some other oaks.

Identification

Leaves are entire and unlobed giving a shingle like appearance that sets this oak apart from most lobed oaks. Flowers appear as male catkins in spring before or with leaf out. Fruit are small acorns that ripen and persist as an important food source for birds and mammals.

Best uses and where to grow

Use Shingle Oak as a long lived shade tree in parks large yards and naturalized upland plantings. It is occasionally grown for timber on suitable sites. The species is native to eastern and central North America and is hardy in USDA zones 5 through 9 so it suits a range of temperate landscapes.

Soil and light

Grows best in well drained loam to clay and tolerates dry rocky upland soils where drainage is good. Prefers slightly acidic to neutral pH and dislikes poorly drained sites which reduce vigor and raise root disease risk. Best performance comes with full sun or part shade.

Planting and spacing

Allow room for a broad crown as open grown trees commonly reach similar width to their height. Space trees about 40 to 50 feet apart to prevent crowding and to accommodate a mature crown. Consult local extension guidance on ideal planting seasons and nursery recommendations for your climate.

Watering and care

Shingle Oak tolerates dry conditions once established so avoid overwatering on heavier soils. Young trees benefit from regular watering through the first two to three years until roots are established. Avoid saturated soils which cause decline and increase susceptibility to root problems.

Wildlife value and toxicity

Produces small acorns that support birds and mammals and add seasonal interest under the tree. Acorns and foliage contain tannins that can be toxic to livestock and cause gastrointestinal upset in pets if eaten in large amounts. Seek veterinary advice for suspected poisoning.

Size and pruning control

Mature height commonly ranges from 40 to 70 feet with a crown spread often near 40 to 50 feet in open grown specimens. Growth rate is slow to moderate compared with other oak species. Prune for structure and clearance while the tree is young to reduce the need for major corrective cuts later.

Frequently asked questions

How fast does Shingle Oak grow?: Growth is slow to moderate compared with many other oaks so expect several years to reach substantial size depending on site fertility and moisture.
How large does Shingle Oak get?: Mature trees typically reach 40 to 70 feet tall with a crown spread commonly around 40 to 50 feet on open sites.
Is Shingle Oak drought tolerant?: Yes it tolerates dry upland soils and is well suited to well drained sites but poor drainage reduces vigor and raises disease risk.
Are the acorns toxic to pets or livestock?: Acorns and foliage contain tannins that can be toxic to livestock and may cause vomiting or diarrhea in pets if eaten in quantity. Contact a veterinarian for suspected poisoning.
What USDA zones will Shingle Oak grow in?: Shingle Oak is suitable for USDA zones 5 through 9 according to regional horticultural sources.
How is Shingle Oak propagated?: Propagation is commonly by seed using acorns and by nursery grown seedlings. Grafting is used for named selections while rooting cuttings is generally difficult.