{"id":"sempervivum","license":"CC-BY-4.0","data":{"scientificName":"Sempervivum","commonNames":["Hens and chicks"],"taxonRank":"genus","acceptedName":"Sempervivum","family":"Crassulaceae","ids":{"usdaSymbol":"SEMPE","gbifKey":2985948,"itisTsn":500552,"wikidataQid":"Q161695","inatTaxonId":62379},"states":["ID","OR","WA"],"hardinessAssertions":[{"minimum":"4","maximum":"10","interpretation":"explicit-range","precision":"whole-zone","zoneMapping":"source-stated","applicability":"applicable","source":"pnw-590","sourceRecordId":"groundcovers:Hens and chicks","sourceTaxon":"Sempervivum spp.","taxonMatch":"exact","sourcePlacement":"Hens and chicks profile, USDA hardiness zones field","sourceVersion":"2023-10","asOf":"2026-08-26T00:00:00.000Z"}],"plantForm":"groundcover","photo":{"file":"/images/plants/sempervivum.jpg","sourceUrl":"https://www.inaturalist.org/photos/26707624","observationUrl":"https://www.inaturalist.org/observations/17543723","license":"cc-by","attribution":"(c) Armin G. Fabritzek, some rights reserved (CC BY)","fetchedOn":"2026-08-23T00:00:00.000Z"},"evidence":[{"source":"pnw-590","verdict":"recommend","verdictRaw":"listed fire-resistant","edition":"2023","url":"https://extension.oregonstate.edu/catalog/pub/pnw-590-fire-resistant-plants-home-landscapes","documentDate":"2023-10-01T00:00:00.000Z","accessedOn":"2026-08-23T00:00:00.000Z"},{"source":"firesmart-bc","verdict":"recommend","verdictRaw":"FireSmart-approved fire-resistant plant","sourcePlacement":{"value":"suitable for HIZ intermediate zone (10-30 m)","scheme":"firesmart-hiz"},"original":"pnw-590","url":"https://firesmartbc.ca/landscaping-hub/fire-resistant-plants/","accessedOn":"2026-08-23T00:00:00.000Z"},{"source":"osu-em-9103","verdict":"recommend","verdictRaw":"fire-resistant plants that thrive in Willamette Valley growing conditions","claims":"The groundcovers profile lists Sempervivum spp. as Hens and Chicks. The profile prints USDA Hardiness Zone: 4–24.","plantPart":"whole-plant","sourcePlacement":{"value":"Hens and Chicks profile (PDF page 15)","scheme":"osu-em-9103-profile"},"edition":"EM 9103, February 2015","url":"https://www.canbyfire.org/files/074d2a9e3/Fire-Resistant-Plants_Willamette-Valley.pdf","documentDate":"2015-02-01T00:00:00.000Z","accessedOn":"2026-08-25T00:00:00.000Z"},{"source":"osu-plant-profile-galleries","verdict":"recommend","verdictRaw":"Choose the right groundcover plants for your fire-resistant landscape","claims":"The Hens and chicks profile prints Sempervivum species. The gallery points to PNW 590 for complete details.","plantPart":"whole-plant","sourcePlacement":{"value":"Hens and chicks — Sempervivum spp.","scheme":"osu-2023-groundcovers-gallery"},"edition":"November 2023 educational gallery","url":"https://extension.oregonstate.edu/gallery/fire-resistant-plant-profiles-groundcovers","documentDate":"2023-11-01T00:00:00.000Z","accessedOn":"2026-08-25T00:00:00.000Z"},{"source":"csu-6305","verdict":"recommend","verdictRaw":"ignitability score 10 of 10","score":{"value":10,"scale":"idaho-0-10"},"claims":"CSU 6.305 table lists Sempervivum spp. (hens and chicks, houseleeks) with the preserved ignitability score.","plantPart":"whole-plant","sourcePlacement":{"value":"suitable for defensible-space zones 1-2 (score 8+)","scheme":"csu-hiz"},"edition":"2025","url":"https://csfs.colostate.edu/wp-content/uploads/2025/08/CSFS_CSU-Ext_Fact-Sheets_IRLP_2025_081825-2_web_accessible.pdf","documentDate":"2025-07-01T00:00:00.000Z","accessedOn":"2026-08-23T00:00:00.000Z"},{"source":"nm-emnrd-firewise-plant-list","verdict":"recommend","verdictRaw":"FireWise Plant List for New Mexico","claims":"Listed as Sempervivum sp. (Hen and chicks) in Flowers and Ground Covers. Printed elevation cells: 4,000 ft=Y, 5,000 ft=Y, 6,000 ft=Y, 7,000 ft=Y, 8,000 ft=Y, 9,000+ ft=Y. Water need: L-M; sun/shade: S/PS; mature height: .5’; approximate bloom: n/a.","plantPart":"whole-plant","sourcePlacement":{"value":"PDF page 6, Flowers and Ground Covers, p6-r29","scheme":"nm-emnrd-firewise-table-row"},"edition":"2003 Forestry Division PDF","url":"https://www.emnrd.nm.gov/sfd/wp-content/uploads/sites/4/Wui_plantlist.pdf","documentDate":"2003-10-08T00:00:00.000Z","accessedOn":"2026-08-26T00:00:00.000Z"}],"flammabilityClass":"fire-resistant","ratingReason":"consensus","recommendation":"on-list","author":"grayson-graham","reviewStatus":"draft","lastVerified":"2026-08-23T00:00:00.000Z","reviewNotes":"Photo auto-selected (top-voted iNat); human review pending."},"localAssessmentInputs":{"stateDistribution":["ID","OR","WA"],"nativeStates":[],"rangeAssertions":[{"relation":"documented-occurrence","geography":{"grain":"state","stateCodes":["ID","OR","WA"]},"provenance":"legacy-field"}],"usdaZoneMin":null,"usdaZoneMax":null,"hardinessAssertions":[{"minimum":"4","maximum":"10","interpretation":"explicit-range","precision":"whole-zone","zoneMapping":"source-stated","applicability":"applicable","source":"pnw-590","sourceRecordId":"groundcovers:Hens and chicks","sourceTaxon":"Sempervivum spp.","taxonMatch":"exact","sourcePlacement":"Hens and chicks profile, USDA hardiness zones field","sourceVersion":"2023-10","asOf":"2026-08-26T00:00:00.000Z","provenance":"cited"}],"hardinessSelection":{"status":"selected","assertion":{"minimum":"4","maximum":"10","interpretation":"explicit-range","precision":"whole-zone","zoneMapping":"source-stated","applicability":"applicable","source":"pnw-590","sourceRecordId":"groundcovers:Hens and chicks","sourceTaxon":"Sempervivum spp.","taxonMatch":"exact","sourcePlacement":"Hens and chicks profile, USDA hardiness zones field","sourceVersion":"2023-10","asOf":"2026-08-26T00:00:00.000Z","provenance":"cited"},"assertions":[{"minimum":"4","maximum":"10","interpretation":"explicit-range","precision":"whole-zone","zoneMapping":"source-stated","applicability":"applicable","source":"pnw-590","sourceRecordId":"groundcovers:Hens and chicks","sourceTaxon":"Sempervivum spp.","taxonMatch":"exact","sourcePlacement":"Hens and chicks profile, USDA hardiness zones field","sourceVersion":"2023-10","asOf":"2026-08-26T00:00:00.000Z","provenance":"cited"}]},"invasiveIn":[],"statusAssertions":[],"fireEvidenceClass":"fire-resistant","recommendation":"on-list","fireSourceScopes":[{"source":"csu-6305","sourceName":"Ignition-Resistant Landscape Plants (Fact Sheet 6.305)","sourceUrl":"https://csfs.colostate.edu/wp-content/uploads/2025/08/CSFS_CSU-Ext_Fact-Sheets_IRLP_2025_081825-2_web_accessible.pdf","geography":{"grain":"state","stateCodes":["CO"]},"completeness":"partial","reviewStatus":"reviewed","scope":"Colorado State University Extension and the Colorado State Forest Service publish Fact Sheet 6.305 for Colorado's WUI and varied ecosystems. FireApproved exposes all 114 exact source owners at Colorado publication scope while retaining score, elevation, water, and Idaho-carrier lineage. Publication scope is not suitability for every Colorado site or zone.","sourceVersion":"CSFS-CSU-Fact-Sheet-6.305-2025-07","asOf":"2025-07-01T00:00:00.000Z"},{"source":"nm-emnrd-firewise-plant-list","sourceName":"FireWise Plant List for New Mexico","sourceUrl":"https://www.emnrd.nm.gov/sfd/wp-content/uploads/sites/4/Wui_plantlist.pdf","geography":{"grain":"state","stateCodes":["NM"]},"completeness":"partial","reviewStatus":"reviewed","scope":"New Mexico Forestry Division publishes this as its FireWise Plant List for New Mexico. FireApproved accounts for all 140 printed rows and publishes 95 exact same-rank owners already represented in the directory; 29 exact taxa without an existing record, 14 unresolved spellings or higher-rank matches, one compound taxon cell, and one species row whose only apparent owner has an infraspecific printed identity remain held. Every published row retains the source's Y, N, ?, or blank elevation cells. Publication scope does not erase those elevation limits or establish suitability for every New Mexico site.","sourceVersion":"NM-EMNRD-Forestry-WUI-Plant-List-2003-10-08","asOf":"2003-10-08T00:00:00.000Z"},{"source":"osu-em-9103","sourceName":"Fire-resistant Landscape Plants for the Willamette Valley (EM 9103)","sourceUrl":"https://www.canbyfire.org/files/074d2a9e3/Fire-Resistant-Plants_Willamette-Valley.pdf","geography":{"grain":"aggregate-region","stateCodes":["OR"],"regions":["Willamette Valley"]},"completeness":"partial","reviewStatus":"reviewed","scope":"OSU Extension says EM 9103 highlights fire-resistant plants that thrive under Willamette Valley growing conditions. FireApproved publishes 172 exact owners only as valley context. The guide shares the PNW 590 lineage and is not a second independent vote or statewide site clearance.","sourceVersion":"OSU-EM-9103-2015-02","asOf":"2015-02-01T00:00:00.000Z"},{"source":"pnw-590","sourceName":"Fire-Resistant Plants for Home Landscapes (PNW 590)","sourceUrl":"https://extension.oregonstate.edu/catalog/pub/pnw-590-fire-resistant-plants-home-landscapes","geography":{"grain":"state","stateCodes":["ID","OR","WA"]},"completeness":"partial","reviewStatus":"reviewed","scope":"The October 2023 joint Pacific Northwest Extension publication explicitly names Oregon, Washington, and Idaho and publishes more than 150 plant profiles. FireApproved has normalized 155 exact plant records from the source; publication scope does not assert that every listed plant suits every site within the three states.","sourceVersion":"PNW-590-October-2023","asOf":"2023-10-01T00:00:00.000Z"}],"firePerformanceConditions":[],"maintenanceAssertions":[],"maintenanceConditions":null,"regulatoryReviews":{},"seedReviews":{}},"legacyCompatibilityProjection":{"nativeStates":[],"invasiveIn":[],"usdaZoneMin":"4","usdaZoneMax":"10"},"localAssessmentContract":"Compare each dimension separately. State noxious-weed seed designations are material-scoped and never become non-seed plant restrictions, ecological-invasive findings, nursery restrictions, alternatives, product evidence, or fire votes. Introduced/established context is not an invasive warning. Minimum-only hardiness has no inferred maximum; canonical source-temperature conversion is validated and contradictory applicable rows project no primary zone. L48 context applies only to conterminous states and is never exact-state status. Fire-performance conditions are not maintenance advice. FEIS fire-ecology context does not vote in the plant classification. Absence of a status row is not regulatory clearance."}