{"schemaVersion":"0.2.0","identity":{"slug":"thuja-plicata","canonicalPath":"/plants/thuja-plicata","botanicalName":"Thuja plicata","commonName":"Western redcedar","type":"tree"},"coldHardiness":{"usdaZones":"5a-7b","plainLanguage":"very cold to cold winters","bandEdgesCelsius":{"coldFloor":-28.88888888888889,"warmCeiling":-12.222222222222221},"rhsEquivalent":{"rating":"H7","summary":"very hardy"}},"provenance":{"reviewStatus":"source-backed","citationCount":18,"citations":[{"field":"identity","source":"efloras","url":"http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=200005457","retrievedAt":"2026-05-17"},{"field":"summary","source":"usda-forest-service-silvics","url":"https://research.fs.usda.gov/silvics/western-redcedar","retrievedAt":"2026-05-17"},{"field":"image","source":"wikimedia-commons","url":"https://commons.wikimedia.org/wiki/Special:FilePath/Thuja%20plicata%20(Western%20Redcedar)%2C%20Capital%2C%20British%20Columbia%201.jpg?width=1200","retrievedAt":"2026-05-17"},{"field":"plant-type","source":"usda-forest-service-silvics","url":"https://research.fs.usda.gov/silvics/western-redcedar","retrievedAt":"2026-05-17"},{"field":"light","source":"usda-forest-service-silvics","url":"https://research.fs.usda.gov/silvics/western-redcedar","retrievedAt":"2026-05-17"},{"field":"moisture","source":"usda-forest-service-silvics","url":"https://research.fs.usda.gov/silvics/western-redcedar","retrievedAt":"2026-05-17"},{"field":"hardiness","source":"nc-state-plant-toolbox","url":"https://plants.ces.ncsu.edu/plants/thuja-plicata/","retrievedAt":"2026-05-17"},{"field":"heat-zone","source":"nc-state-plant-toolbox","url":"https://plants.ces.ncsu.edu/plants/thuja-plicata/","retrievedAt":"2026-05-17"},{"field":"size","source":"nc-state-plant-toolbox","url":"https://plants.ces.ncsu.edu/plants/thuja-plicata/","retrievedAt":"2026-05-17"},{"field":"spacing","source":"nc-state-plant-toolbox","url":"https://plants.ces.ncsu.edu/plants/thuja-plicata/","retrievedAt":"2026-05-17"},{"field":"habit","source":"usda-forest-service-silvics","url":"https://research.fs.usda.gov/silvics/western-redcedar","retrievedAt":"2026-05-17"},{"field":"design-roles","source":"nc-state-plant-toolbox","url":"https://plants.ces.ncsu.edu/plants/thuja-plicata/","retrievedAt":"2026-05-17"},{"field":"seasonal-interest","source":"usda-forest-service-silvics","url":"https://research.fs.usda.gov/silvics/western-redcedar","retrievedAt":"2026-05-17"},{"field":"growth-stages","source":"usda-forest-service-silvics","url":"https://research.fs.usda.gov/silvics/western-redcedar","retrievedAt":"2026-05-17"},{"field":"lifecycle","source":"usda-forest-service-silvics","url":"https://research.fs.usda.gov/silvics/western-redcedar","retrievedAt":"2026-05-17"},{"field":"regional-guidance","source":"usda-forest-service-silvics","url":"https://research.fs.usda.gov/silvics/western-redcedar","retrievedAt":"2026-05-17"},{"field":"success-tips","source":"usda-forest-service-silvics","url":"https://research.fs.usda.gov/silvics/western-redcedar","retrievedAt":"2026-05-17"},{"field":"designer-notes","source":"usda-forest-service-silvics","url":"https://research.fs.usda.gov/silvics/western-redcedar","retrievedAt":"2026-05-17"}],"sources":[{"label":"Silvics of North America (USDA Forest Service Agriculture Handbook 654)","url":"https://research.fs.usda.gov/silvics/western-redcedar","license":"U.S. federal government work (public domain); cite the species chapter with its author, Burns and Honkala (1990) eds."},{"label":"Fire Effects Information System (USDA Forest Service)","url":"https://www.fs.usda.gov/database/feis/plants/tree/thupli/all.html","license":"U.S. federal government work (public domain); cite and link the species review with its author and year."},{"label":"eFloras (Flora of North America, Flora of China)","url":"http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=200005457","license":"Flora treatments © Flora of North America Association / Missouri Botanical Garden and Harvard University Herbaria; paraphrased with attribution. 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