{"id":"zoysia-japonica","license":"CC-BY-4.0","data":{"scientificName":"Zoysia japonica","commonNames":["Zoysiagrass"],"taxonRank":"species","acceptedName":"Zoysia japonica","family":"Poaceae","ids":{"usdaSymbol":"ZOJA","gbifKey":2704737,"itisTsn":42273,"wikidataQid":"Q15227563","inatTaxonId":170451},"usdaZoneMin":"6b","zoneSource":"usda-plants","states":["AL","CA","FL","ID","IL","IN","KY","LA","MD","NY","OH","TN","VA"],"rangeAssertions":[{"relation":"introduced","geography":{"grain":"state","stateCodes":["AL"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 78 — Southeastern U.S.A.","TDWG level 3 ALA — Alabama"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z"},{"relation":"introduced","geography":{"grain":"state","stateCodes":["CA"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 76 — Southwestern U.S.A.","TDWG level 3 CAL — 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Virginia"]},"occurrenceStatus":"present","presenceStatus":"extant","source":"wcvp-v16","sourceVersion":"16","asOf":"2026-06-04T00:00:00.000Z"}],"statusAssertions":[{"status":"introduced-established","channel":"ecological","geography":{"grain":"aggregate-region","regions":["L48"]},"source":"us-riis-v2","sourceRecordId":"USRIIS-L48-Plantae11393","sourceVersion":"2.0 (November 2022)","asOf":"2022-10-23T00:00:00.000Z","sourceModified":"2017-11-21T00:00:00.000Z","sourceTaxon":{"name":"Zoysia japonica","rank":"species","rawRank":"Species"},"sourceDesignation":{"code":"C3","label":"established (category C3)"},"associatedReferences":["USDA Natural Resources Conservation Service (NRCS) PLANTS Database (2021fof), https://plants.usda.gov/home/plantProfile?symbol=ZOJA"],"taxonProjection":{"basis":"exact-taxon","notes":"exact source identifier, rank, family, and scientific/accepted name"}}],"hardinessAssertions":[{"minimum":"6b","interpretation":"minimum-threshold","precision":"half-zone","zoneMapping":"derived-containing-band","sourceMeasurement":{"kind":"minimum-temperature","value":-3,"unit":"degrees-fahrenheit"},"applicability":"applicable","source":"usda-plants-characteristics","sourceRecordId":"ZOJA","sourceTaxon":"Zoysia japonica","taxonMatch":"source-identifier","sourcePlacement":"PlantCharacteristics record 26486, Temperature, Minimum (°F)","sourceVersion":"PLANTS Help Document 2022; characteristics cache retrieved 2026-08-23","asOf":"2026-08-26T00:00:00.000Z"}],"plantForm":"grass","matureHeightFt":0.4,"waterNeed":"moderate","photo":{"file":"/images/plants/zoysia-japonica.jpg","sourceUrl":"https://www.inaturalist.org/photos/370314889","observationUrl":"https://www.inaturalist.org/observations/209257542","license":"cc-by","attribution":"(c) WATANABE Hitoshi 渡辺仁, some rights reserved (CC BY)","fetchedOn":"2026-08-23T00:00:00.000Z"},"evidence":[{"source":"idaho-firewise-master-db","verdict":"recommend","verdictRaw":"fire-resistance score 10 of 10","score":{"value":10,"scale":"idaho-0-10"},"sourcePlacement":{"value":"plantable at 10' from home","scheme":"idaho-distance"},"url":"https://idahofirewise.org/wp-content/uploads/2017/04/FireXResistanceXofXPlantsXMasterXDatabase.pdf","accessedOn":"2026-08-23T00:00:00.000Z"},{"source":"flamits","verdict":"not-rated","verdictRaw":"time to flaming (s): 0.58","score":{"value":0.58,"scale":"FLAMITS — time to flaming (s)"},"claims":"FLAMITS record 5689; Ignitability measurement; plant part leaves; fuel live; predrying no; device burning bench; site Kim1994-1; sampling ND. Primary study Kim1994: Kim, K., Jang, I., & Kim, S. (1994). Moisture content of litter layer and its combustibility by cigarette light in forests. Korean Journal of Ecology (Korea Republic), 17, 1-9.","plantPart":"leaf","original":"Kim1994","edition":"Dryad version 9","url":"https://doi.org/10.5061/dryad.h18931zr3","documentDate":"2023-12-22T00:00:00.000Z","accessedOn":"2026-08-25T00:00:00.000Z"},{"source":"flamits","verdict":"not-rated","verdictRaw":"time to flaming (s): 0.89","score":{"value":0.89,"scale":"FLAMITS — time to flaming (s)"},"claims":"FLAMITS record 5697; Ignitability measurement; plant part leaves; fuel live; predrying no; device burning bench; site Kim1994-1; sampling ND. Primary study Kim1994: Kim, K., Jang, I., & Kim, S. (1994). Moisture content of litter layer and its combustibility by cigarette light in forests. Korean Journal of Ecology (Korea Republic), 17, 1-9.","plantPart":"leaf","original":"Kim1994","edition":"Dryad version 9","url":"https://doi.org/10.5061/dryad.h18931zr3","documentDate":"2023-12-22T00:00:00.000Z","accessedOn":"2026-08-25T00:00:00.000Z"}],"flammabilityClass":"fire-resistant","ratingReason":"limited-evidence","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":["AL","CA","FL","ID","IL","IN","KY","LA","MD","NY","OH","TN","VA"],"nativeStates":[],"rangeAssertions":[{"relation":"introduced","geography":{"grain":"state","stateCodes":["AL"],"regions":["TDWG level 1 7 — NORTHERN AMERICA","TDWG level 2 78 — Southeastern U.S.A.","TDWG level 3 ALA — 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2026-08-23","asOf":"2026-08-26T00:00:00.000Z","provenance":"cited"}],"hardinessSelection":{"status":"selected","assertion":{"minimum":"6b","interpretation":"minimum-threshold","precision":"half-zone","zoneMapping":"derived-containing-band","sourceMeasurement":{"kind":"minimum-temperature","value":-3,"unit":"degrees-fahrenheit"},"applicability":"applicable","source":"usda-plants-characteristics","sourceRecordId":"ZOJA","sourceTaxon":"Zoysia japonica","taxonMatch":"source-identifier","sourcePlacement":"PlantCharacteristics record 26486, Temperature, Minimum (°F)","sourceVersion":"PLANTS Help Document 2022; characteristics cache retrieved 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labels itself \"For Southern Idaho\" and describes Idaho residents at the urban-rangeland interface. FireApproved publishes 419 existing plant owners that cite its scored rows. This bounded Southern Idaho scope is regional context, not statewide coverage or a conclusion that the score transfers unchanged to every Idaho site.","sourceVersion":"Idaho-Firewise-Southern-Idaho-Master-2013-11-08","asOf":"2013-11-08T00:00:00.000Z"}],"firePerformanceConditions":[],"maintenanceAssertions":[],"maintenanceConditions":null,"regulatoryReviews":{},"seedReviews":{}},"legacyCompatibilityProjection":{"nativeStates":[],"invasiveIn":[],"usdaZoneMin":"6b"},"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."}