Overcup Oak

Quercus lyrata

Medium to large deciduous oak for lowland and floodplain planting. Tolerates poorly drained soils and seasonal flooding while providing broad shade.

Key Facts

  • Native to bottomlands and floodplains of the southeastern and central United States.
  • Tolerates poorly drained and seasonally flooded soils better than many other oaks.
  • Deciduous shade tree with a rounded to broad crown.
  • Acorn cups often nearly enclose the nut, giving the species its common name.
  • Used in wetland restoration and lowland landscape planting.
  • Growth rate is moderate to moderately fast under favorable moisture.
  • Wind pollinated with inconspicuous spring flowers in the form of catkins.

Overcup Oak (Quercus lyrata) is a medium to large deciduous oak native to lowland floodplains. It is valued where soils are poorly drained or seasonally flooded and makes a broad shade tree for wet sites with periodic inundation.

Identification

Deciduous shade tree with a rounded to broad crown and acorns whose cups often nearly enclose the nut, which gives the species its common name. Flowers are inconspicuous spring catkins and wind pollinated. Mature dimensions vary with site moisture and competition.

Best uses and where to grow

Well suited to bottomlands stream banks and wetland restoration where periodic flooding occurs. Plant in lowland landscape settings or naturalized wet areas rather than dry compacted uplands. USDA hardiness zones generally reported as 5 to 9 which covers much of the southeastern and central United States.

Planting and spacing

Propagate from acorns sown in fall or from nursery transplants for quicker establishment. Allow room for a broad crown when spacing young trees. Typical mature spread is commonly 40 to 60 feet so plan planting distances that match the expected canopy to avoid crowding and root competition.

Soil and light

Prefers moist to wet soils and tolerates poorly drained and seasonally flooded conditions while performing best in acidic to neutral soils. Plant in full sun to light shade for best form and trunk development. Prolonged drought or very dry soils reduce vigor and slow growth.

Watering and maintenance

Tolerates standing water during seasonal floods but young trees need consistent moisture until established. On dry sites expect slower growth and greater stress. Routine maintenance is limited to removing dead wood and controlling competing vegetation around the root zone to encourage straight growth.

Wildlife value and toxicity

Produces acorns that are an important mast crop for wildlife. Acorns and fresh foliage contain tannins that can be toxic to livestock and may cause gastrointestinal or kidney issues if consumed in large amounts. Exercise caution with grazing animals and monitor pets for ingestion of acorns.

Containers and landscape control

Not suitable as a long term container specimen because of large mature size and wide crown. Use as an open landscape or restoration tree on lowland sites and remove volunteer seedlings if you want to limit natural recruitment in adjacent plantings.

Propagation

Propagate by collecting acorns and sowing in fall or by storing acorns moist and cold for stratification before planting. Nursery transplants are commonly used for landscape installation and provide the fastest route to shade.

Frequently asked questions

How fast does Overcup Oak grow?
Growth rate is moderate to moderately fast under favorable moisture with faster diameter increase on rich wet sites and slower growth on dry or compacted soils.
How large does Overcup Oak get?
Mature height is commonly reported as about 40 to 80 feet and typical spread is commonly 40 to 60 feet depending on site conditions.
What soil does Overcup Oak prefer?
Prefers moist to wet soils and tolerates poorly drained and seasonally flooded conditions. It favors acidic to neutral pH but tolerates a range of soil types.
Is Overcup Oak suitable for wet sites?
Yes. This species thrives in bottomlands and floodplains and is commonly used in wetland restoration and lowland landscape plantings.
Are the acorns toxic to pets or livestock?
Acorns contain tannins that can be toxic to livestock and may cause digestive or kidney issues if eaten in large amounts. Confirm specific risks with local extension or poison control.

Gallery

Quercus Lyrata
Quercus Lyrata - © Bruce Kirchoff

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