Lobelia erinusL.

edging lobelia

WFO wfo-0000815543 Accepted WFO 2026-06 8 photographs CC0 / CC BY / CC BY-SA

Plate 1 figs. a–h · 8 separate observations

Lobelia erinus, photographed by Piermario Maculan
fig. a Piermario Maculan, CC0 1.0 / 2022-06-08 / obs. 204450521

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Native range 22 botanical countries

Regions where Lobelia erinus is native: Angola, Botswana, Cape Provinces, Caprivi Strip, Chad, DR Congo, Eswatini, Ethiopia, Free State, KwaZulu-Natal, Lesotho, Malawi, Mozambique, Namibia, Niger, Northern Provinces, Senegal, Somalia, Sudan-South Sudan, Tanzania, Zambia, Zimbabwe AngolaBotswanaCape ProvincesCaprivi StripChadDR CongoEswatiniEthiopiaFree StateKwaZulu-NatalLesothoMalawiMozambiqueNamibiaNigerNorthern ProvincesSenegalSomaliaSudan-South SudanTanzaniaZambiaZimbabwe
Native distribution of Lobelia erinus, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows.
RegionTDWG codeContinent
Angola ANG AFRICA
Botswana BOT
Cape Provinces CPP
Caprivi Strip CPV
Chad CHA
DR Congo ZAI
Eswatini SWZ
Ethiopia ETH
Free State OFS
KwaZulu-Natal NAT
Lesotho LES
Malawi MLW
Mozambique MOZ
Namibia NAM
Niger NGR
Northern Provinces TVL
Senegal SEN
Somalia SOM
Sudan-South Sudan SUD
Tanzania TAN
Zambia ZAM
Zimbabwe ZIM

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Flowering 367 in flower of 371 examined

Proportion of examined Lobelia erinus in flower, by month
Month In flower Examined Share 95% interval
Jan 22 22 100% 85% to 100%
Feb 11 11 100% 74% to 100%
Mar 12 12 100% 76% to 100%
Apr 16 16 100% 81% to 100%
May 29 29 100% 88% to 100%
Jun 27 28 96% 82% to 99%
Jul 20 21 95% 77% to 99%
Aug 45 45 100% 92% to 100%
Sep 35 35 100% 90% to 100%
Oct 51 52 98% 90% to 100%
Nov 61 62 98% 91% to 100%
Dec 38 38 100% 91% to 100%

Peak flowering in Jan. Each bar is the share of Lobelia erinus observations in which someone actually recorded the reproductive state and found the plant in flower, not the raw number of flowering records. That distinction matters: people observe plants far more in spring than in winter, so a bare count of flowering records partly measures when people go outside. Dividing by the number examined removes that. 367 of 371 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. This is still a global aggregate and not a forecast for your garden: the same species flowers on different dates in different hemispheres. Where a species has fewer than 30 flowering records we do not draw this chart at all. Computed from 10.15468/dl.cgje2x.

Where it actually grows measured, from 1,988 observations

Condition 5th percentile Median 95th percentile
Coldest month, mean daily low -6.3 °C 5.7 °C 12.0 °C
Warmest month, mean daily high 17.9 °C 22.9 °C 30.4 °C
Annual rainfall 450 mm 825 mm 1,865 mm
Rainfall in the driest quarter 10 mm 110 mm 262 mm

It is found where winters bring hard frost. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 1,988 research-grade observations of Lobelia erinus that carry a coordinate, and this is the range those places actually span. The 5th and 95th percentiles are used rather than the minimum and maximum, because a single cultivated specimen in a heated conservatory should not widen a tropical plant's range to the Arctic.

This is not a hardiness zone. A USDA zone is the average annual extreme minimum temperature. The figure above is the mean daily minimum of the coldest month, which is a different quantity and is typically far warmer. Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one. Climate from CHELSA V2.1 (Karger et al. 2017); occurrences from 10.15468/dl.cgje2x.

Also published as 80 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Dortmanna debilis var. natalensis Kuntze
  • Dortmanna erinodes Kuntze
  • Dortmanna erinus Kuntze
  • Dortmanna erinus var. bellidifolia (L.f.) Kuntze
  • Dortmanna flexuosa Kuntze
  • Dortmanna lavendulacea Kuntze
  • Dortmanna senegalensis (A.DC.) Kuntze
  • Enchysia erinoides (L.) C.Presl
  • Grammatotheca erinoides (L.) Sond.
  • Laurentia erinoides (L.) G.Nicholson
  • Lobelia acutangula A.DC.
  • Lobelia algoensis A.DC.
  • Lobelia altimontis E.Wimm.
  • Lobelia bellidifolia Thunb.
  • Lobelia bellidifolia L. ex B.D.Jacks.
  • Lobelia benguellensis Hiern
  • Lobelia bicolor Sims
  • Lobelia bracteolata A.DC.
  • Lobelia candida hort. ex Link
  • Lobelia chilawana Schinz
  • Lobelia dortmanni Hort.Dammann
  • Lobelia erinifolia Salisb.
  • Lobelia erinoides Thunb.
  • Lobelia erinoides L.

and 56 more.

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
  3. Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. Retrieved 2026-07-13.
  4. Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite.