#1011 most planted
Tsuga mertensiana
Mountain hemlock · also Hemlock spruce, Alpine hemlock, Black hemlock
ConiferEvergreen
190
trees mapped
0.00%
of all named trees
4
cities
2.0 in
median trunk (5 cm, 172 measured)
7.8 yr
median age (57% have a planting date)
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Mountain hemlock is an evergreen conifer with deeply furrowed grayish-brown bark, a narrow crown, and gracefully drooping branches. It thrives in subalpine areas and has high water needs. This species attracts birds and squirrels.
Where it grows
Trees in each city's inventory, with the share of that city's named trees this species accounts for.
- 1040.14%7.8 yr2.0 in
- 810.04%—7.0 in
- 30.01%——
- 20.00%—16 in
Traits
- Form
- Conifer
- Foliage
- Evergreen
- Mature height
- 30–50 ft
- Canopy spread
- 15–25 ft
- Growth rate
- Moderate
- Water needs
- High
- Drought tolerance
- Low
- Wildlife value
- Moderate
- Blooms
- Jun, Jul, Aug
Trunk diameters across every city: median 2.0 in, mean 5.1 in, 90th percentile 12 in. Measured at breast height, as published by each inventory.
Native range
Terrestrial ecoregions where this species is native. Trees in the dataset mostly stand well outside it.
Temperate Conifer Forests
- British Columbia coastal conifer forests
- Central British Columbia Mountain forests
- Central Pacific Northwest coastal forests
- Northern California coastal forests
- Northern Pacific Alaskan coastal forests
- Northern Rockies conifer forests
- Sierra Nevada forests
- South Central Rockies forests
Other Tsuga in the catalogue
8 of the top 2,000 species are in this genus.
