Late-flowering Boneset, Late-flowering Thoroughwort, Late Boneset

Eupatorium serotinum

Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Eupatorium (yoo-puh-TOR-ee-um) (Info)
Species: serotinum (se-roh-TEE-num) (Info)



Water Requirements:

Average Water Needs; Water regularly; do not overwater

Sun Exposure:

Full Sun

Sun to Partial Shade




Foliage Color:

Unknown - Tell us


36-48 in. (90-120 cm)

4-6 ft. (1.2-1.8 m)


24-36 in. (60-90 cm)


USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

Where to Grow:

Unknown - Tell us


Unknown - Tell us

Bloom Color:

White/Near White

Bloom Characteristics:

This plant is attractive to bees, butterflies and/or birds

Flowers are fragrant

Bloom Size:

Unknown - Tell us

Bloom Time:

Late Summer/Early Fall

Other details:

Unknown - Tell us

Soil pH requirements:

Unknown - Tell us

Patent Information:


Propagation Methods:

Unknown - Tell us

Seed Collecting:

Collect seedhead/pod when flowers fade; allow to dry


This plant is said to grow outdoors in the following regions:

Shirley, Arkansas

Lula, Georgia

Urbana, Illinois

Wheaton, Illinois

Derby, Kansas

Barbourville, Kentucky

Benton, Kentucky

Baton Rouge, Louisiana

Baldwin, Maryland

Millersville, Maryland

Cole Camp, Missouri

Frenchtown, New Jersey

Hamilton, Ohio

Jay, Oklahoma

Bethel Park, Pennsylvania

Downingtown, Pennsylvania

Norristown, Pennsylvania

Modoc, South Carolina

Memphis, Tennessee

Viola, Tennessee

Fort Worth, Texas

Princeton, Texas

Great Cacapon, West Virginia

show all

Gardeners' Notes:


On Sep 24, 2015, Rickwebb from Downingtown, PA wrote:

It is a handsome native wildflower that commonly grows in moist or wet meadows or woodland edges from south Texas up into Nebraska over into central Wisconsin to Massachusetts down to south Florida. It is cold hardy to USDA Zone 4. It grows well in the common pH range of 6.0 to 7.5, but not sure how much more. It has pale white flower clusters blooming in September and October that are fragrant, sort of lilac-like in scent. It has long-stalked lanceolate leaves. It is a good pollinator plant. It is offered by some native plant nurseries.


On Aug 24, 2014, cottelpg from Hamilton, OH (Zone 6a) wrote:

The Pollinator Party Palace. In the fall of 2013 a plant volunteered in my front bed that I thought was a Veronica. So I transplanted it to an appropriate place on my border. After it emerged and grew in the spring of 2014, I soon recognized that it was not a veronica. I was going to pull it, but decided to wait and took a branch to a plant identification expert at The University of Cincinnati, fully expecting him to tell me it was a noxious weed. Instead he told me it was Eupatorium serotinum, a native plant. He said it would have a pretty white bloom in the late fall and that it would attract pollinators. He urged me to keep it, so I gave it a home in my garden. I discovered its odd common name, Late Boneset. In Late August it bloomed. The bloom is attractive, but not spectacul... read more