Swamp Post Oak
Quercus lyrata
Last reviewed: June 2026
Swamp Post Oak (Quercus lyrata) is not on the ASPCA Animal Poison Control Center toxic plant list for dogs or cats (aspca.org, last reviewed 2026-05-21). If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.
Light
full sun
Water
high
Size
360"–600" H × 240"–480" W
Bloom
Apr, May
Native to
AL, AR, DE, FL and 15 more states
Pollinators
bees, beetles
Browse plants for this ecoregion
Swamp post oak is a large native tree that thrives in wet soils and low-lying areas. This deciduous oak produces small spring flowers followed by acorns and develops a broad, spreading canopy that provides excellent shade.
In an HOA neighborhood
Swamp Post Oak is an HOA-friendly choice. Maintenance level: moderate. Tidiness: 4 out of 5.
Works well in: front yard, street edge, mid zone.
- Very large mature size may overwhelm smaller properties
- Acorn drop in fall requires cleanup
Wildlife value
The spring flowers attract bees and beetles, while the acorns feed squirrels, deer, and numerous bird species. As a native oak, it supports hundreds of caterpillar species that are crucial food sources for birds.
Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Does Swamp Post Oak fit your yard? Open it in Pollinator Patch to check it against your sun, soil, and HOA-conscious filters.