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For my part, I consider that it will be found much better by all parties to leave the past to history, especially as I propose to write that history myself.
Winston Churchill

Fall Splendor

Commonly Western Larch will grow in mixed stands, usually mixed with spruce and fir. When it grow with doug fir or pines, it quickly outgrows them, and shades them out. But on occasion you will find mixed stands when fire hit at the right time and place.


2 year old Western Larch

These guys have survived 2 winters now. They are a bit over 2 feet tall. This shot was taken in mid September. Some are starting to change colour.


Big Larch

This pic, shamelessly snagged from Lady Nomad's blog, shows how large they can get. That trunk is somewhere between 8 and 10 feet in diameter. I do NOT recommend this tree for a city lot.

Western Larch

Larix occidentalis

This is experimental here on the prairies. My first reading of western larch told me it wouldn't work here on the prairies. It's managed two winters so far.

It's native to the mountains in interior BC, and grows quite a ways up those slopes, but I didn't see it on the valley floor. Turns out that it's frost sensitive. In spring cold air falling off the mountains can provide a deep layer of freezing temperatures that hurt the opening buds.

Lesson learned: Don't plant it in a frost pocket.

The soils where it grows are usually well drained. It's likely to be less tolerant of heavy clay soils, especially when those soils are flat and slow to dry in spring.

Lesson: Plant on a slope, or on gravely sandy soils.

Ok, so why plant it. Visually it is very similar to Siberian Larch.

It grow faster, and gets larger. How big? Up to 80 meters tall. Up to 850 years old.

It's also more prone to shedding lower branches as it ages. Along with the heavy bark at maturity it resists fire.

Larch from valley to timberline

Larch at timberline. This is in the Northern Cascades. Yes, Washington State is south of us and a lot warmer. But this is close to 7000 feet.


Western Larch, Hart's Pass

This is near the upper end of their range. Kind of ratty looking. this is a north slope, so they don't get as much sun. Should do better with regular care and full sun.


Guidelines

Features:

Zone: Zone 4, based on where I've seen it grow, Oregon State University; I've seen reports of zone 2 (Plants for a future) I suspect spring frost is the biggest threat to use on the prairies.

Size: 50 to 80 feet tall by 25 feet wide.

Growth rate: Fast. Trees easily reach 100 feet in 50 years.

Soil: Likes moist deep well drained soils. Tolerates the high calcium/magnesium soils we have on the prairies. Tolerates poor soils.

Water Where it grows natively it typically gets 25-30 inches of precipitation per year. In the southern end of it's range it will grow only on the north slope, where at the north end, it grows on both north and south slopes. I think the south slope at southern latitudes is too dry. These same slopes also don't have spruce, which is a common co-dominant tree. Generally tolerates moderately dry to moist soils.

Sun: Full sun preferred. Tolerates some shade.

Water: During first year. Drought tolerant. Water when top 2 inches of soil are dry, and water deeply. Should only need to be watered 3-4 times. If you continue to water you will get faster growth, but continue to water deeply when you do.

More info: Western Larch -- USFS Silvics Manual


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