SelecTree: Tree Detail

WESTERN LARCH
Larix occidentalis

Larix occidentalis Larix occidentalis Larix occidentalis Larix occidentalis Larix occidentalis Larix occidentalis Larix occidentalis Larix occidentalis

Photo Locations: Hoyt Arboretum - Portland, OR, Finch Arboretum - Spokane, WA and Arnold Arboretum - Boston, MA.

General Notes

A tall timber species (150 - 200 feet) when groing in its native range, but usually much shorter in landscapes.

Native to Northwestern United States.

Family: Pinaceae

Additional Common Names

WESTERN LARCH, TAMARACK

Tree Characteristics

Erect and requires ample growing space.

Conical Shape.

Has Deciduous foliage.

Height: 30 - 50 feet.

Width: 10 - 15 feet.

Growth Rate: 24 Inches per Year.

Longevity Greater than 150 years.

Leaves Needle, Bluish Green or Silver or Gray Green, Golden or Yellow or Orange, Deciduous.

Flowers in Spring. Has separate male and female reproductive parts on the same tree (monoecious).

Purple or Red Cone, Medium (0.50 - 1.50 inches), fruiting in Summer.

Bark Red Brown, Furrowed or Scaly.

Shading Capacity Rated as Moderately Dense in Leaf.

Shading Capacity Rated as Moderate out of Leaf.

Litter Issue is Dry Fruit.

Tree Site Conditions & Constraints

Sunset Zones 1 - 7; A3.

USDA Hardiness Zones 4 - 8.

Exposure Full Sun to Partial Shade.

Moist Soil.

Clay, Loam or Sand Texture.

Highly Acidic to Slightly Alkaline Soil pH.

Seaside Tolerance is Not Suited.

Pests & Disease Information

Susceptible to Beetle Borers and Beetle Grubs, Armillaria, Root Rot and Rust.

Health, Safety & Environmental Concerns

Branch Strength Rated as Strong.

Root Damage Potential Rated as Moderate.

Allergy Health Hazard.

Fire Resistance is Unfavorable.

Desirable Wildlife Plant.

Attracts Birds.

Cite this tree:
SelecTree. "Larix occidentalis Tree Record." 1995-2020. Aug 14, 2020.
< https://selectree.calpoly.edu/tree-detail/larix-occidentalis >

This tree is not part of the SelecTree Nursery Connection. If you would like to see this tree listed, or know of a nursery that sells it, please contact us at ufei@calpoly.edu.