Pollinator plant

Blue Jacob's Ladder

Polemonium caeruleum

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Common names

29 names · 19 languages
EnglishYour language
Other languages (18)
Dutch
  • Jacobsladder
  • Jakobsladder[1][2]
French
Chinese (Simplified)
+1 more nameShow fewer names
Czech
  • jirnice modrá[2]
Danish
  • Jakobsstige[2]
Estonian
  • harilik sinilatv[2]
Finnish
  • lehtosinilatva[2]
German
Japanese
  • ヨウシュハナシノブ[2]
Lithuanian
  • Mėlynasis palemonas[2]
Mongolian
  • …инжбуурал[2]
Norwegian
  • fjellflokk[2]
Polish
  • wielosił błękitny[2]
Russian
  • Синюха голубая[2]
Slovak
  • vojnovka belasá[2]
Swedish
Turkish
  • Mızrakotu[2]
Ukrainian
  • Синюха голуба[2]
Sources & name notes (4)

Names recorded in our plant catalogue and botanical sources, grouped by language. Usage can vary by region.

Catalogue language labels are reviewed separately from botanical source records.

Numbered references identify names recorded by an external source. Other names are from our plant catalogue.

[1] Polemonium caeruleum — iNaturalist taxon names ↗

Community-curated iNaturalist taxonomy. This is a common-name attestation, not an independent botanical determination.

Source records
  • Blue Jacob's Ladder — results[1].names[2]; taxon id 51704; Polemonium caeruleum.
  • Blaue Himmelsleiter — results[1].names[6]; taxon id 51704; Polemonium caeruleum.
  • Blaues Sperrkraut — results[1].names[7]; taxon id 51704; Polemonium caeruleum.
  • Jakobsleiter — results[1].names[1]; taxon id 51704; Polemonium caeruleum.
  • Jacob's Ladder — results[1].names[4]; taxon id 51704; Polemonium caeruleum.
  • Polémoine bleue — results[1].names[8]; taxon id 51704; Polemonium caeruleum.
  • Valériane grecque — results[1].names[9]; taxon id 51704; Polemonium caeruleum.
  • Échelle de Jacob — results[1].names[10]; taxon id 51704; Polemonium caeruleum.
  • Jakobsladder — results[1].names[15]; taxon id 51704; Polemonium caeruleum.
[2] Polemonium caeruleum — iNaturalist taxon names ↗

Community-curated iNaturalist taxonomy; common-name attestation, not an independent botanical determination.

Source records
  • Blue Jacob's Ladder — results[8].names[2]; taxon id 51704; Polemonium caeruleum.
  • Blaue Himmelsleiter — results[8].names[6]; taxon id 51704; Polemonium caeruleum.
  • Blaues Sperrkraut — results[8].names[7]; taxon id 51704; Polemonium caeruleum.
  • Jakobsleiter — results[8].names[1]; taxon id 51704; Polemonium caeruleum.
  • Jacob's Ladder — results[8].names[4]; taxon id 51704; Polemonium caeruleum.
  • Polémoine bleue — results[8].names[8]; taxon id 51704; Polemonium caeruleum.
  • Valériane grecque — results[8].names[9]; taxon id 51704; Polemonium caeruleum.
  • Échelle de Jacob — results[8].names[10]; taxon id 51704; Polemonium caeruleum.
  • Jakobsladder — results[8].names[15]; taxon id 51704; Polemonium caeruleum.
  • lehtosinilatva — results[8].names[5]; taxon id 51704; Polemonium caeruleum.
  • jirnice modrá — results[8].names[11]; taxon id 51704; Polemonium caeruleum.
  • Jakobsstige — results[8].names[12]; taxon id 51704; Polemonium caeruleum.
  • Синюха голубая — results[8].names[13]; taxon id 51704; Polemonium caeruleum.
  • fjellflokk — results[8].names[14]; taxon id 51704; Polemonium caeruleum.
  • Mėlynasis palemonas — results[8].names[16]; taxon id 51704; Polemonium caeruleum.
  • harilik sinilatv — results[8].names[17]; taxon id 51704; Polemonium caeruleum.
  • 花荵 — results[8].names[18]; taxon id 51704; Polemonium caeruleum.
  • blågull — results[8].names[19]; taxon id 51704; Polemonium caeruleum.
  • …инжбуурал — results[8].names[20]; taxon id 51704; Polemonium caeruleum.
  • Синюха голуба — results[8].names[21]; taxon id 51704; Polemonium caeruleum.
  • ヨウシュハナシノブ — results[8].names[22]; taxon id 51704; Polemonium caeruleum.
  • wielosił błękitny — results[8].names[23]; taxon id 51704; Polemonium caeruleum.
  • vojnovka belasá — results[8].names[24]; taxon id 51704; Polemonium caeruleum.
  • 电灯花 — results[8].names[25]; taxon id 51704; Polemonium caeruleum.
  • 穴菜 — results[8].names[26]; taxon id 51704; Polemonium caeruleum.
  • 鱼翅菜 — results[8].names[27]; taxon id 51704; Polemonium caeruleum.
  • Mızrakotu — results[8].names[28]; taxon id 51704; Polemonium caeruleum.
[3] Royal Horticultural Society — common names ↗

Names retained from the referenced botanical profile or table.

Source records
  • Jacob’s ladder — Page 4, column 2, row top 277 pt; common-name cell after Polemonium caeruleum.; Polemonium caeruleum.
[4] Royal Horticultural Society — common names ↗

Names retained from the referenced botanical profile or table.

Source records
  • Jacob’s ladder — Page 4, column 2, row top 457 pt; common-name cell after Polemonium caeruleum.; Polemonium caeruleum.
Plant references

Source-backed information

Published observations for this plant. Each reference supports the information beside it.

Taxonomy
Polemonium caeruleum is an accepted species in Catalogue of Life.

Taxonomic treatment in the August 2026 release; the catalogue record name is preserved.

Sources [1]
Botanical family
Polemoniaceae

Family in the cited taxonomic treatment.

Sources [1]
Pollinator guidance
RHS includes Polemonium caeruleum in its Plants for Pollinators guidance.

RHS planting guidance. Choose accessible flowers with pollen and nectar; reduced-resource and double-flowered forms may be unsuitable.

Sources [2] [3]
Native range
Europe to Japan and Himalaya.

Explicit native locality records in Kew WCVP v16; introduced and doubtful distributions excluded. Continent conversion follows the documented geographic mapping.

Sources [4]
Catalogue ratings

Who this plant supports

Honey bees

Medium suitability
Nectar value Medium
Pollen value Medium
Plant profile

About this plant

Blue Jacob's Ladder (Polemonium caeruleum) is a herbaceous plant. It flowers from May to June.

Sources and references

References for the information marked with source numbers on this page.

Sources checked
  1. Catalogue of Life Polemonium caeruleum — Catalogue of Life COL26.8

    COL26.8 (2026-08-20). Contributing checklist: Synonymic Checklists of the Vascular Plants of the World. This is taxonomic evidence, not an independent ecological study.

    Supports: TaxonomyBotanical family
    Relevant sections
    • Taxonomy: NameUsage.tsv line 990164; ID 4KXG7; rank species; status accepted
    • Botanical family: NameUsage.tsv line 990164; ID 4KXG7; rank species; status accepted

    Source checked on .

    Source data licence: CC BY 4.0.

  2. Royal Horticultural Society RHS Plants for Pollinators — Wildflowers

    RHS planting guidance; applicable flower-form restrictions are retained. General recommendations do not measure local nectar or pollen production.

    Supports: Pollinator guidance
    Relevant sections
    • Pollinator guidance: Page 4, column 2, entry Polemonium caeruleum (top 277 pt)

    Source checked on .

  3. Royal Horticultural Society RHS Plants for Pollinators — Garden Plants

    RHS planting guidance; applicable flower-form restrictions are retained. General recommendations do not measure local nectar or pollen production.

    Supports: Pollinator guidance
    Relevant sections
    • Pollinator guidance: Page 4, column 2, entry Polemonium caeruleum (top 457 pt)

    Source checked on .

  4. Royal Botanic Gardens, Kew Polemonium caeruleum — Kew WCVP native distribution

    Native distribution and taxonomic treatment from the official WCVP v16 export (4 June 2026). The link opens the corresponding POWO taxon. Source rows are retained in the native-range audit archive.

    Supports: Native range
    Relevant sections
    • Native range: WCVP v16; wcvp_names.csv lines 315428; wcvp_distribution.csv native locality lines 1067937, 1067938, 1067940, 1067941, 1067942, 1067944, 1067945, 1067947, 1067948, 1067949, 1067950, 1067951, 1067952, 1067953, 1067954, 1067955, 1067956, 1067957, 1067958, 1067959, 1067960, 1067961, 1067962, 1067963, 1067964, 1067965, 1067966, 1067967, 1067968, 1067969

    Source checked on .

    Source data licence: CC BY 3.0.