Western Hemlock

Growing Conditions

Light

Shade Tolerance Tolerant

Water

Water Use Medium

Drought Tolerance Low

Flood Tolerance None

Soil

Soil Types Loam

CaCO3 Tolerance None

Fertility Need Medium

Stress Tolerance

Fire Tolerance Low

Salt Tolerance None

Climate

pH Range 4.5 – 6.0

Frost-Free Days 150 days

Precipitation 38 – 150 in

Ecosystem & Wildlife

Pollinators Larval Host (Butterfly); Larval Host (Moth); Wind

Larval Host Achytonix praeacuta, Acleris gloverana, Acleris gloveranus, Acleris variana, Adelphagrotis stellaris, Agrochola pulchella, Anagoga occiduaria, Anavitrinella pampinaria, Apotomops wellingtoniana, Archips packardiana, Argyresthia tsuga , Argyrotaenia niscana, Argyrotaenia tabulana, Aseptis binotata, Callophrys eryphon, Campaea perlata, Caripeta aequaliaria, Caripeta divisata, Choristoneura fumiferana, Choristoneura rosaceana, Cladara limitaria, Clemensia albata, Coleotechnites atrupictella, Dasychira grisefacta, Dasychira vagans, Dasypyga alternosquamella, Diarsia esurialis, Dysstroma citrata, Ectropis crepuscularia, Egira perlubens, Eilema bicolor, Enypia griseata, Enypia packardata, Enypia venata, Epinotia tsugana, Epirrita autumnata omissa, Epirrita pulchraria, Erannis tiliaria vancouverensis, Eulithis propulsata, Eulithis xylina, Eupithecia annulata, Eupithecia filmata, Eupithecia graefii vanxouverata, Eupithecia harrisonata, Eupithecia longipalpata, Eupithecia luteata bifasciata, Eupithecia olivacea, Eupithecia palpata, Eupithecia placidata, Eupithecia transcanadata, Eupithecia unicolor, Eupithecia usurpata, Euplexia benesimilis, Eustroma fasciata, Feralia comstocki, Feralia jocosa, Gabriola dyari, Griselda radicana, Hesperumia sulphuraria, Hydriomena californiata, Hydriomena irata, Hydriomena marinata exasperata, Hydriomena renunciata, Hydriomena speciosata, Hypagyrtis piniata, Lambdina fiscellaria, Lambdina fiscellaria lugubrosa, Lambdina fiscellaria somniaria, Lithophane innominata, Lophocampa argentata, Malacosoma californica pluvialis, Melanolophia imitata, Mitoura nelsoni nelsoni, Mniotype miniota, Nematocampa filamentaria, Neoalcis californiaria, Neophasia menapia, Nepytia canosaria, Nepytia phantasmaria, Nepytia umbrosaria, Nepytia umbrosaria nigrovenaria, Operophtera occidentalis, Orgyia antiqua, Orgyia antiqua badia, Orgyia pseudotsugata, Orthosia hibisci, Palthis angulalis, Panthea portlandia - group, Papestra cristifera, Pero behrensaria, Pero mizon, Pero morrisonaria, Phlogophora periculosa, Promylea lunigerella, Protoboarmia porcelaria, Protoboarmia porcelaria indicataria, Pseudorthodes irrorata, Sabulodes edwardsata, Semiothisa adonis, Semiothisa granitata-group, Semiothisa perplexa, Semiothisa signaria, Semiothisa unipunctaria, Spiramater lutra, Stenoporpia albescens, Stenoporpia pulmonaira albescens, Stenoporpia pulmonaira satisfacta, Sunira decipiens, Synaxis pallulata, Syngrapha alias, Syngrapha celsa, Syngrapha rectangula, Syngrapha selecta, Thallophaga hyperborea, Thallophaga taylorata, Tolype dayi, Tolype laricis, Xestia homogena, Xestia mustelina, Zale minerea norda, Zeiraphera diniana, Zeiraphera fortunana, Zeiraphera ratzeburgiana

Fall Color No

Evergreen Yes

Native Range

USA: Alaska, California, Idaho, Montana, Oregon, Washington
CAN: Alberta, British Columbia

Regional Native Status: L48 (N), AK (N), CAN (N)

State-level native status is based on data available through Plants of the World Online. Regional Native Status comes from the USDA Plants Database. For more detailed native status information, please refer to BONAP.