Black-eyed Susan
റുഡ്ബെക്കിയ ഹിർത
Rudbeckia hirta L.
- light
- Sun–part
- water
- Medium
- tall
- 75 cm
- wide
- 41 cm
Asteraceae
Also called Black-eyed-Susan, Brown betty, Blackeyed Susan, Common black-eyed Susan, Black-eyed coneflower
Formerly Centrocarpha hirta, Coreopsis hirta, Helianthus hirtus, Peramibus hirtus
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
- Biennial or perennialKew's checklist, not yet checked
- Climate
- TemperateKew's checklist, not yet checked
- Wild in
- C. & E. Canada 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 and RHS, checked by a majority of its sourcesBacked by both sources
- Height
- 51 cm to 99 cmRead from NC State Extension, RHS and Wikipedia, checked by a majority of its sourcesBacked by 2 of 3 sources. Sources differ: NC State Extension 2–4 ft; RHS 0.5–1 m; Wikipedia 30–100 cm
- Spread
- 30 cm to 51 cmRead from NC State Extension, RHS and Wikipedia, checked by a majority of its sourcesBacked by 2 of 3 sources. Sources differ: NC State Extension 1–2 ft; RHS 0.1–0.5 m; Wikipedia 30–45 cm
- Water
- Average: moist, well drainedRead from NC State Extension and RHS, checked by a majority of its sourcesBacked by both sources
- Flowers
- Yellow, orange, redRead from NC State Extension, RHS and Wikipedia, checked by a majority of its sourcesBacked by 2 of 3 sources. Sources differ: NC State Extension orange, red, yellow; RHS yellow; Wikipedia brown, orange, red, yellow
- Coldest it survives
- -22.5 °C (USDA zone 6a)Read from NC State Extension and RHS, checked: the middle of what its sources sayHalfway between its 2 sources, which differ. Sources differ: NC State Extension -40 °C; RHS -5 °C
Not known yet: heat, hottest it survives.
In other languages (12)
- root
- RUDHIR, ᏐᏤᎾ, enkvtopokv-lvste
- French
- rudbeckie hérissée
- German
- Schwarzäugige Rudbeckie, Rauhaarige Rudbeckie
- Portuguese
- Margarida-amarela
- Czech
- třapatka srstnatá
- Russian
- Рудбекия волосистая
- Norwegian Bokmål
- lodnesolhatt
- Finnish
- kesäpäivänhattu
- Lithuanian
- Plaukuotoji rudbekija
- Ojibwa
- Mangishkiinzhigwe (Wezawab Gonik)
- Estonian
- karvane päevakübar
- Chinese (China)
- 黑心金光菊
Where this comes from
- iNaturalist, read 2026-10-24, CC0-1.0 (observation counts)
- Wikidata, read 2026-10-26, CC0-1.0
- Kew's checklist, read 2026-10-24, CC-BY-4.0
- NC State Extension, read 2026-10-25, fact, cited
- RHS, read 2026-10-25, fact, cited
- Wikipedia, read 2026-10-25, fact, cited
- Wikimedia Commons, read 2026-10-24, CC BY-SA 3.0
- iNaturalist, read 2026-10-25, CC0
- iNaturalist, read 2026-10-25, CC0
- iNaturalist, read 2026-10-25, CC BY
- 3D model: Rudbeckia hirta (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.