Common sneezeweed
Helenium autumnale L.
- light
- Sun–part
- water
- Plenty
- tall
- 1.1 m
- wide
- 76 cm
Asteraceae
Also called Swamp sunflower, Autumn sneezeweed, False sunflower, Sneezeweed, Autumn Sneezeweed
Formerly Heleniastrum autumnale, Heleniastrum montanum, Helenium altissimum, Helenium canaliculatum, and 11 more
When it flowers
Not known yet in the tropics: too few flowering observations to read a season from.
Read from iNaturalist photographs of it in flower. A month counts at 50% of the best month's flowering share (smoothed over three months) and 10% of its flowering count, from at least 100 flowering observations in the band.
If a child, a pet or anyone may have eaten a plant, contact a doctor or vet straight away, or call the National Poisons Information Centre (AIIMS, New Delhi) on 1800 116 117, free and open 24 hours.
Something wrong with it?About it
- Grows as
- PerennialKew's checklist, not yet checked
- Climate
- TemperateKew's checklist, not yet checked
- Wild in
- Subarctic America to U.S.A.Kew's checklist, not yet checked
- Light
- Full sun to part shade (3 h or more)Read from NC State Extension, one source
- Height
- 91 cm to 1.3 mRead from NC State Extension and Wikipedia, checked by a majority of its sourcesBacked by both sources. Sources differ: NC State Extension 3–5 ft; Wikipedia 60–130 cm
- Spread
- 61 cm to 91 cmRead from NC State Extension, one source
- Water
- Plenty: wet or constantly moistRead from NC State Extension, one source
- Flowers
- YellowRead from NC State Extension and Wikipedia, checked by a majority of its sourcesBacked by both sources. Sources differ: NC State Extension brown, orange, yellow; Wikipedia yellow
- Coldest it survives
- -40 °C (USDA zone 3a)Read from NC State Extension, one source
Not known yet: heat, hottest it survives.
In other languages (12)
- root
- HELAUT, Nií’ii’nił
- French
- hélénie automnale
- Czech
- záplevák podzimní
- German
- Gewöhnliche Sonnenbraut
- Japanese
- ダンゴギク
- Estonian
- sügisheleenium, sügis-säralill
- Swedish
- solbrud
- Russian
- Гелениум осенний
- Danish
- Høst-solbrud
- Lithuanian
- Rudeninė saulainė
- Hungarian
- Őszi napfényvirág
- Chinese (China)
- 堆心菊, 堆心菊（原变种）
Where this comes from
- iNaturalist, read 2026-10-26, CC0-1.0 (observation counts)
- Wikidata, read 2026-10-25, CC0-1.0
- Kew's checklist, read 2026-10-24, CC-BY-4.0
- NC State Extension, read 2026-10-25, fact, cited
- Wikipedia, read 2026-10-25, fact, cited
- Wikimedia Commons, read 2026-10-25, CC BY-SA 3.0
- iNaturalist, read 2026-10-26, CC0
- iNaturalist, read 2026-10-26, CC BY
- iNaturalist, read 2026-10-26, CC0
- 3D model: Helenium autumnale (built for Vanagrha) by Vanagrha, own
A fact “checked by a majority of its sources” was settled by a vote of the pages it was read from, not by a person reading it; one marked “one source” rests on that page alone. Anything else not marked checked has not been checked yet. Where nothing is known, the page says so rather than guess.