Bloomipedia
Oakleaf hydrangea (Hydrangea quercifolia)
Photo: Dan Vickers via iNaturalist · CC BY 4.0 · resized

Flower profile

Oakleaf hydrangea

Hydrangea quercifolia

★ Official state wildflower of Alabama (1999)Native in the lower 48

Oakleaf hydrangea is a flowering plant that USDA PLANTS lists as native in the lower 48 states. It's on our flower lists for 3 states, and across the U.S. it's most often seen in bloom in April–June.

8states
3of our state lists
5,027U.S. sightings*

*iNaturalist research-grade observations, as of October 17, 2026.

On our lists for: Alabama, Georgia, Mississippi

🏅
Alabama's official state wildflower since 1999. Visit the Alabama page → Code of Ala. § 1-2-11

Quick look

Hydrangea quercifolia, commonly known as oakleaf hydrangea or oak-leaved hydrangea, is a species of flowering plant in the family Hydrangeaceae. It is native to the southeastern United States, in woodland habitats from North Carolina west to Tennessee, and south to Florida and Eastern Texas. A deciduous shrub with white showy flower heads, it is grown as a garden plant, with numerous cultivars available commercially.

  • It belongs to the Hydrangeaceae family. iNaturalist
  • USDA PLANTS describes it as a shrub with a perennial life cycle. USDA PLANTS
  • USDA PLANTS lists it as native in the lower 48 states and records it in 8 states. USDA PLANTS
  • NatureServe lists it as native to Alabama, Georgia and Mississippi. NatureServe
  • In Alabama, most iNaturalist sightings of it in flower come in May–July. iNaturalist
  • In Georgia, most iNaturalist sightings of it in flower come in April–September. iNaturalist
  • USDA PLANTS lists its flower color as white. USDA PLANTS
  • USDA PLANTS gives its bloom period as late spring. USDA PLANTS
  • USDA PLANTS lists a mature height of about 6 ft. USDA PLANTS
  • iNaturalist has 2,155 research-grade sightings of it in Alabama, ranking #8 among the 111 flowers on our Alabama list. iNaturalist
  • iNaturalist has 1,008 research-grade sightings of it in Georgia, ranking #90 among the 111 flowers on our Georgia list. iNaturalist
  • iNaturalist has 352 research-grade sightings of it in Mississippi, ranking #71 among the 110 flowers on our Mississippi list. iNaturalist

Oakleaf hydrangea gift ideas

Handmade oakleaf hydrangea gifts from independent makers.

When does it bloom?

Flowering records by month across the U.S. (iNaturalist research-grade observations marked “Flowering”) (257 records)
Bloom time in each of our 3 states
StateTypePeak bloomSightings*
AlabamaNativeMay–July2,155
GeorgiaNativeApril–September1,008
MississippiNativeMay–July352

Conservation status

Federal (U.S. ESA)
Not listed No U.S. Endangered Species Act listing in the USFWS ECOS database. USFWS ECOS
NatureServe global
G5 Secure worldwide. NatureServe
Alabama
No list Alabama has no state law listing endangered or threatened plants, so we show NatureServe's Alabama ranks instead. NatureServe: SNR, not yet ranked in Alabama.
Georgia
Not listed Not on Georgia protected plants (Ga. Comp. R. & Regs. 391-4-10-.09; a 2026 update is proposed). NatureServe: SNR, not yet ranked in Georgia. Ga. R. 391-4-10-.09
Mississippi
No list Mississippi has no state law listing endangered or threatened plants, so we show NatureServe's Mississippi ranks instead. NatureServe: S4, apparently secure in Mississippi.
Rare elsewhere
No other U.S. state ranks it S1, S2, SH or SX.

Checked October 17, 2026. Rankings and lists can change, so follow the links for the latest.

Can you eat it?

For peoplePoisonous to people

NC State Extension lists it as poisonous to humans (severity: low). Poisonous parts: bark, flowers, leaves. Symptoms they list: “Nausea, stomach pain, vomiting, sweating.” NC State Extension

For petsCan be a problem for cats, children, dogs and horses

NC State Extension flags it as a problem for cats, children, dogs and horses. It isn't on the ASPCA plant list. NC State Extension

🌿 Never eat a wild plant unless you're certain of its ID; this isn't medical advice. Worried about a person? Call Poison Control at 1-800-222-1222. Worried about a pet? Call your vet.

Where does it grow?

USDA PLANTS records oakleaf hydrangea in 8 states plus Washington, D.C.

recorded by USDA PLANTS on our state lists not recorded

See the full list of states

Alabama, Florida, Georgia, Louisiana, Mississippi, North Carolina, South Carolina, Tennessee; District of Columbia.

Alabama counties with USDA records: Autauga, Baldwin, Barbour, Bibb, Blount, Bullock, Butler, Calhoun, Chambers, Chilton, Choctaw, Clarke, Clay, Cleburne, Coffee, Colbert, Conecuh, Coosa, Cullman, Dallas, DeKalb, Escambia, Etowah, Fayette, Franklin, Geneva, Greene, Hale, Henry, Jackson, Jefferson, Lamar, Lauderdale, Lawrence, Lee, Lowndes, Macon, Marengo, Marion, Marshall, Mobile, Monroe, Montgomery, Morgan, Perry, Pickens, Pike, Randolph, Russell, Shelby, St. Clair, Sumter, Talladega, Tallapoosa, Tuscaloosa, Walker, Wilcox, Winston.

Georgia counties with USDA records: Clay, Dade, Decatur, Early, Floyd, Harris, Heard, Meriwether, Murray, Polk, Randolph, Talbot, Taylor, Upson, Walker.

Mississippi counties with USDA records: Adams, Alcorn, Amite, Attala, Benton, Calhoun, Carroll, Claiborne, Clarke, Clay, Copiah, DeSoto, Forrest, Franklin, Grenada, Hinds, Holmes, Itawamba, Jasper, Jefferson, Jefferson Davis, Jones, Lafayette, Lauderdale, Lawrence, Leake, Lee, Madison, Marion, Monroe, Montgomery, Panola, Perry, Pike, Pontotoc, Prentiss, Smith, Tallahatchie, Tishomingo, Union, Warren, Wayne, Webster, Wilkinson, Winston, Yalobusha, Yazoo.

More Alabama flowers

Sources