Overcup oak (Quercus lyrata)

Overcup oak

Also known as: Swamp post oak

Known for its distinct acorn cup, the overcup oak tree gets it name because the cup (or hat) of the acorn covers almost the entire nut. This tree is prized for its use in urban landscaping because of its slow-growing nature, deep green summer foliage, and yellowish brown fall leaves.

Scientific classification

Species

Overcup oak (Quercus lyrata)

Beeches, walnuts, and allied trees

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Toxic to Humans

Toxicity

Perennial

Lifespan

Tree

Plant Type

Spring

Bloom Time

Summer, Fall

Harvest Time

11 m to 18 m

Plant Height

9 m to 12 m

Spread

Green, Silver, Gray, Red, Bronze, Brown

Leaf Color

8 cm to 10 cm

Flower Size

Deciduous

Leaf type

5 - 32 ℃

Ideal Temperature

Images of Overcup oak

Attributes of Overcup oak

Growth Rate

Overcup oak experiences moderate growth during the spring and summer seasons. This speed allows overcup oak to steadily gain height and initiate new leaf production. The moderate growth also promotes the development of a strong, expansive root system. The spring growth sees overcup oak producing shiny, broad leaves while in summer, it focuses more on height and girth expansion, demonstrating the plant's resilience in diverse environmental conditions.

Culture

Garden Use

The ornamental overcup oak provides plenty of shade and decoration to water or pond gardens. You can plant it in moist soil along the edge of ponds. When you grow it near ponds, you're likely to draw in ducks and other waterfowl who enjoy eating the nuts. This tree is easy to grow and hardy, resistant to deer and hot temperatures.

Symbolism

Protection, Health, Money

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Toxicity

The overcup oak tree contains tannins, mainly in young leaves and seeds, causing potential poisoning. Humans, especially children may ingest parts, leading to digestive issues and depressive symptoms. Dogs and cats risk poisoning from consuming leaves or seeds, resulting in gastrointestinal upset. Immediate veterinary care is crucial for affected pets.

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Quickly Identify Overcup oak

Distinctive lyre-shaped leaves with deep lobes and sinuses.

Large acorns with thick, woody cup covering most of the nut.

Grey, pubescent acorn cup with soft hair-like scales.

Shiny, dark green leaves with 5-9 deeply rounded lobes.

Distinctive grey bark with deep furrows and scaly ridges.

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Care Guide for Overcup oak

Every 1-2 weeks

Water

Full sun

Sunlight

5 - 32 ℃

Ideal Temperature

Garden Soil

Soil Type

Water: Overcup oak originates from wetlands and floodplains, thriving in consistently moist soil but tolerating moderate drought. Watering should occur every 1-2 weeks to prevent waterlogging. As an outdoor tree, overcup oak benefits from natural rainfall during the growing season, reducing the need for intervention.

Fertilize: For overcup oak, use a balanced slow-release fertilizer in early spring for growth. High nitrogen formulas are beneficial for young trees. Avoid late summer fertilization to protect new growth. Water thoroughly after fertilizing, and reduce frequency as overcup oak matures to promote natural growth and health.

Pruning: Overcup oak features rounded lobed leaves and early-detaching acorns. Early spring pruning is essential for health; remove dead branches and thin crowded areas to improve air circulation. Maintain a strong central leader for structural integrity, enhancing the tree's shape and vigor.

Propagation: Overcup oak can be propagated in Autumn and Winter via hardwood cuttings, layering, or seeds. Moderate difficulty and signs of success include root and shoot development. To enhance success, ensure cuttings have three nodes and remove competing leaves or buds.

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Images of Overcup oak

Attributes of Overcup oak

Culture

Toxicity

Quickly Identify Overcup oak

Care Guide for Overcup oak

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