How to Grow Western Red Cedar

Thuja plicata · Zones 4-10

Western Red Cedar is a tree, a long-term addition to the landscape. It's hardy across USDA zones 4 through 10 and shrugs off deer.

Zones

4-10

pH Range

5.1-7.1

Sun

Shade

Days to Maturity

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Score Western Red Cedar on your exact land.

Zone averages can't see the slope, soil, frost, and sun that decide whether western red cedar actually takes — and those shift from one yard to the next. Enter your address and we'll score western red cedar against your land's real conditions.

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USDA PLANTS DatabaseUSDA PHZM 2023ASPCA

What Western Red Cedar is

Western Red Cedar grows as a perennial and reaches around 60 feet at maturity. It blooms in mid spring. It's also deer-resistant.

How to grow Western Red Cedar

Western Red Cedar grows in USDA zones 4 through 10. Western Red Cedar does best in shade — at least 2 hours of direct sun a day — and soil from pH 5.1 to 7.1. It needs about 800 hours of winter chill, which is why climate matters as much as soil.

USDA Zones

4-10

USDA PHZM 2023

Soil pH

5.1 - 7.1

USDA PLANTS Database

Sun

Shade

plant_species_v5.csv

Drainage

Data pending

plant_species_v5.csv

Frost Tolerance

-33°F

plant_species_v5.csv

Mature Height

60 ft

plant_species_v5.csv

Chill Hours

800+

plant_species_v5.csv

Frost-Free Days

0+

plant_species_v5.csv

  1. Plant it right

    Set western red cedar in shade with well-drained soil. Many fruit trees need a second variety nearby to pollinate — check before you plant just one.

  2. Match the soil

    Western Red Cedar prefers pH 5.1 to 7.1 (USDA PLANTS Database). A quick soil test from your local Extension lab tells you whether to add lime or sulfur to land in band.

  3. Water steadily

    Keep the root zone evenly moist through establishment. Match watering to the plant's drainage preference and your local rainfall.

  4. Be patient, then harvest

    Prune annually while the tree establishes; fruit trees reward patience with years of harvest. Local Extension guides publish per-cultivar bearing-age tables.

Good to know

Good news for pet owners — western red cedar isn't known to be toxic to dogs or cats. (Source: ASPCA.)

Western Red Cedar isn't classified as a notable pollinator plant in our data — pair it with high-value bloomers nearby to feed bees.

Free Report

See if Western Red Cedar will thrive on your land

Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether western red cedar actually takes — we score it against the real conditions at your address.

Three things about your exact spot that zone averages miss:

Your soil pHYour frost-free daysYour sun & shade

We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.

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Frequently Asked Questions

Can I grow Western Red Cedar in my zone?

Western Red Cedar grows in USDA hardiness zones 4 through 10 (USDA PHZM 2023). Zone is one factor — soil pH, drainage, and frost dates on your specific parcel also shape whether it takes.

When should you plant Western Red Cedar?

Set western red cedar out in early spring or fall while it's dormant, so the roots establish before the heat of summer. Your local last-frost date — which a Growable Ground report pulls for your exact address — sets the precise window.

How much sun does Western Red Cedar need?

Western Red Cedar is shade-tolerant — it gets by on as little as 2 hours of direct sun, so it earns a place most vegetables can't use. A north-facing strip or the ground under a leafy canopy is right where it belongs. A Growable Ground report shows which corners of your land stay shaded through the day, turning those dim spots into planting spots.

What soil does Western Red Cedar need?

Western Red Cedar prefers soil pH 5.1 to 7.1 (USDA PLANTS Database). Your report scores your parcel's actual soil against that using USDA SSURGO data.

Does Western Red Cedar attract pollinators?

Western Red Cedar isn't classified as a notable pollinator plant in our data. Pairing it with high-value bloomers nearby keeps bees and butterflies fed.

Is Western Red Cedar safe for pets?

Western Red Cedar is not known to be toxic to dogs or cats based on available data (ASPCA). Always supervise pets around new plantings.