Mountain Hemlock
Tsuga mertensiana (Bong.) Carrière - Pine family
Size
Mature Height: Up to around 125.0 feet
Planting Distance: 6.0 feet
Plant Type: Tree
Root Depth: 40 inches
Growth Form: Single Stem
Growth Rate: Slow
Features
Flower Color: Yellow
Conspicuous Flowers: No
Bloom Time: Early Summer
Seasonal Growth: Summer
Evergreen: Yes
Fall Colors: No
Conditions
Shade Tolerance: Tolerant
Clay Soil Tolerance: No
Sandy Soil Tolerance: Yes
Drought Tolerance: Low
Flood Tolerance: None
Fire Tolerance: Low
Salt Tolerance: None
Ecosystem Interactions
Pollinators: Larval Host (Moth); Wind
Larval Species depending on Mountain Hemlock: Acleris variana, Apotomops wellingtoniana, Aseptis binotata, Caripeta divisata, Choristoneura fumiferana, Cladara limitaria, Enypia packardata, Enypia venata, Epirrita autumnata omissa, Epirrita pulchraria, Eupithecia annulata, Eupithecia harrisonata, Eupithecia longipalpata, Eupithecia palpata, Eupithecia spermaphaga, Eupithecia transcanadata, Eupithecia unicolor, Eupithecia vinsullata, Feralia jocosa, Gabriola dyari, Hydriomena irata, Hydriomena speciosata, Melanolophia imitata, Neoalcis californiaria, Nepytia phantasmaria, Panthea portlandia - group, Pero behrensaria, Semiothisa granitata-group, Stenoporpia albescens, Synaxis pallulata, Syngrapha rectangula, Syngrapha selecta, Thallophaga hyperborea, Xestia mustelina
Native Range
- USA: Alaska, California, Idaho, Montana, Nevada, Oregon, Washington
- CAN: British Columbia
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.