Photo by Melody

PlantFiles: Wild Quinine, American Feverfew
Parthenium integrifolium

Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Parthenium (par-THEN-ee-um) (Info)
Species: integrifolium (in-teg-ree-FOH-lee-um) (Info)

Synonym:Parthenium integrifolium var. integrifolium

5 vendors have this plant for sale.

5 members have or want this plant for trade.


36-48 in. (90-120 cm)

18-24 in. (45-60 cm)

USDA Zone 3a: to -39.9 C (-40 F)
USDA Zone 3b: to -37.2 C (-35 F)
USDA Zone 4a: to -34.4 C (-30 F)
USDA Zone 4b: to -31.6 C (-25 F)
USDA Zone 5a: to -28.8 C (-20 F)
USDA Zone 5b: to -26.1 C (-15 F)
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)

Sun Exposure:
Full Sun


Bloom Color:
White/Near White

Bloom Time:
Late Spring/Early Summer
Mid Summer


Other details:
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater
This plant may be considered a protected species; check before digging or gathering seeds

Soil pH requirements:
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information:

Propagation Methods:
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; sow indoors before last frost

Seed Collecting:
Allow seedheads to dry on plants; remove and collect seeds

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By Equilibrium
Thumbnail #1 of Parthenium integrifolium by Equilibrium

By Dacooolest
Thumbnail #2 of Parthenium integrifolium by Dacooolest

By Equilibrium
Thumbnail #3 of Parthenium integrifolium by Equilibrium

By creekwalker
Thumbnail #4 of Parthenium integrifolium by creekwalker

By creekwalker
Thumbnail #5 of Parthenium integrifolium by creekwalker

By 01_William
Thumbnail #6 of Parthenium integrifolium by 01_William

By 01_William
Thumbnail #7 of Parthenium integrifolium by 01_William

There are a total of 12 photos.
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3 positives
2 neutrals
No negatives

Gardeners' Notes:

Positive Rickwebb On Dec 4, 2013, Rickwebb from Downingtown, PA wrote:

I bought three small plants in 2003 and they are doing all well in 2013 here in se PA in my good quality clay soil with a pH of 6.9. They do self-sow some around in the garden. I transplanted two small plants from self-sowing to a site 20 miles east of where I live, with silty slightly acid soil. Big plants can be hard to transplant due to big, coarse, lateral roots. A strong, reliable, easy, low maintenance plant that stays as a big clump that does not need dividing. It blooms all through June into early September. Some flower scapes will lodge and should be cut away. Good pollinator plants for various insects. Big native range in eastern North America.

Neutral PANSEL On May 21, 2012, PANSEL from Lexington, VA wrote:

5/19/12 - Growing wild by roadside Blue Ridge Parkway nr. milepost 69 in Virginia. In bloom.

Positive chiron On Aug 29, 2011, chiron from Midland, MI (Zone 5b) wrote:

After seeing this native in a prairie restoration I was thrilled to find it offered at a plant sale, grown from seed. The foliage makes a bold statement in the spring, but it's the chalky white flowers that are the real prize. The plants have an incredibly long bloom season, from June through August, and still going strong. They are a wonderful addition to a white garden, and are lovely by moonlight.

Positive Opoetree On Jun 11, 2004, Opoetree from Oak View, CA wrote:

I think this wild variety of feverfew is what keeps growing in my yard. I have never planted it, but it grows sporadically in small clumps near my house. Because I always found it near our native live oaks, I always thought of it being a 'companion' to those trees. It is like a delightful little weed, very pretty with nice foliage. It can get rather bushy if it gets enough water. I like it well enough, and have heard that as a medicinal herb it can ease the pain of migraine headaches (although I have also read that it has the potential to be poisonous).

Neutral Terry On Sep 11, 2001, Terry from Murfreesboro, TN (Zone 7a) wrote:

A native wildflower, blooms for 3-4 weeks in midsummer with small white flowers in flat-topped clusters.

Since the leaves of this species are serrated, it is unknown why the plant bears the species name integrifolium which means "entire" (i.e., margins lack lobes or teeth.)

Seed collecting can be tricky, as the plant produces few viable seeds. The viable seeds are slightly larger and darker (gray-colored) than the pale, nonviable seeds.


This plant has been said to grow in the following regions:

Gurley, Alabama
Fallbrook, California
Redding, California
Cornelia, Georgia
Des Plaines, Illinois
Machesney Park, Illinois
Washington, Illinois
Wichita, Kansas
Midland, Michigan
Cole Camp, Missouri
Downingtown, Pennsylvania
Argyle, Wisconsin
Pleasant Prairie, Wisconsin

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