Photo by Melody

PlantFiles: Sneezeweed, Helen's Flower, Dogtooth Daisy
Helenium autumnale

Family: Asteraceae (ass-ter-AY-see-ee) (Info)
Genus: Helenium (hel-EE-nee-um) (Info)
Species: autumnale (aw-tum-NAH-lee) (Info)

Synonym:Helenium canaliculatum
Synonym:Helenium latifolium
Synonym:Helenium parviflorum
Synonym:Helenium autumnale var. autumnale

3 vendors have this plant for sale.

19 members have or want this plant for trade.


4-6 ft. (1.2-1.8 m)

36-48 in. (90-120 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

All parts of plant are poisonous if ingested

Bloom Color:
Bright Yellow
Maroon (Purple-Brown)

Bloom Time:
Late Summer/Early Fall
Mid Fall


Other details:
This plant is attractive to bees, butterflies and/or birds
Average Water Needs; Water regularly; do not overwater

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

Patent Information:

Propagation Methods:
By dividing the rootball

Seed Collecting:
Collect seedhead/pod when flowers fade; allow to dry

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There are a total of 19 photos.
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3 positives
3 neutrals
No negatives

Gardeners' Notes:

Positive Malus2006 On Oct 16, 2008, Malus2006 from Coon Rapids, MN (Zone 4a) wrote:

Becoming more commonly planted in gardens - I just saw a wild patch at O'Brien State Park in Minnesota - it is a single plant that was somewhat beaten up because it was on the edge of a path - it is growing in some grasses near a stream which means that it like wet areas. Can be id by its 3 dents in each petals - not too many other daisies have that.

Positive drlith On Sep 20, 2005, drlith from Lanham, MD wrote:

I grew these from seed started as transplants this spring, and I'm amazed at how large and lovely they are blooming in their first year! They take over at just about the time rudbeckia are fading fast.

Positive lmelling On Jan 18, 2005, lmelling from Ithaca, NY (Zone 5b) wrote:

Can be grown in any fertile, moist but well-drained soil in full sun. They flower over a long period and are wonderful as cut flowers.

May cause severe discomfort if ingested and contact with foliage may aggravate skin allergies.

Neutral JodyC On Jan 17, 2005, JodyC from Palmyra, IL (Zone 5b) wrote:

Probably the most common visitors to the flowers are long-tongued bees, including honeybees, bumblebees, Miner bees, and large Leaf-Cutting bees. Other visitors include wasps, butterflies, bee flies, and beetles. These insects seek nectar or collect pollen, although some beetles eat the pollen. The caterpillars of Papaipema rigida (Rigid Sunflower Borer Moth) bore through the stems and eat the pith. Mammalian herbivores usually don't feed on this plant because the foliage is toxic and bitter. There have been reports of severe poisoning for livestock that have consumed this plant, which produces such symptoms as congestion of the kidneys and liver, formation of necrotic areas in the lungs, and irritation of the digestive tract. Not surprisingly, this plant is considered an 'increaser' in grazed meadows.

Neutral talinum On Jun 2, 2002, talinum from Kearney, NE (Zone 5a) wrote:

The best growth occurs in full sun and moist soil. Dry conditions accelerate powdery mildew. Most cultivars need to be staked. It should be cut back one-half to two-thirds after blooming. Divide the root clump every 3 years. It can be pinched in May to June to keep it smaller.

Neutral killerdaisy On Aug 8, 2001, killerdaisy from Dallas, TX (Zone 8a) wrote:

Best with lots of moisture, but can tolerate some drought. Divide every year in spring. May be troubled by rust or leaf spots.


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

Los Angeles, California
Washington, District Of Columbia
Satellite Beach, Florida
Lula, Georgia
Naperville, Illinois
Indianapolis, Indiana
Jeffersonville, Indiana
Iowa City, Iowa
Derby, Kansas
Lansing, Kansas
Barbourville, Kentucky
Skowhegan, Maine
Lanham, Maryland
Spencer, Massachusetts
Macomb, Michigan
Minneapolis, Minnesota (2 reports)
Saint Paul, Minnesota
Frenchtown, New Jersey
Neptune, New Jersey
Ithaca, New York
Glouster, Ohio
Pickerington, Ohio
Florence, Oregon
Portland, Oregon
Allentown, Pennsylvania
Harrisburg, Pennsylvania
Lincoln University, Pennsylvania
Quakertown, Pennsylvania
Provo, Utah
Leesburg, Virginia
Olympia, Washington
Sumas, Washington

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