Pacific Northwest Planting Calendar
Month-by-month planting calendar for the Pacific Northwest. 143 crops with sow windows for a mild maritime climate.
Monthly Planting Calendar
The maritime Pacific Northwest (USDA 8b-9a west of the Cascades) has mild, wet winters and cool summers. Cool-season crops thrive almost year-round, and the long, gentle shoulder seasons suit leafy greens, brassicas, peas and roots. The main limit is summer heat: tomatoes, peppers and other heat-lovers need a warm, sheltered spot or a tunnel and go out in late spring once the soil warms. Last frost is typically late March and the first fall frost around mid-November. These windows are a first-pass estimate from regional extension guidance (OSU and WSU) and are being reviewed locally.
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Growing Guides
In-depth guides for the most popular crops and techniques. These guides adapt to your region.
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When is the planting season in the Pacific Northwest?
Cool-season crops can go in across the long spring and fall shoulders, roughly March-April and August-September, and many overwinter in the mild lowland winter. Frost-tender crops wait until late spring (May-June) once the soil warms.
Why do tomatoes struggle in the Pacific Northwest?
Summers west of the Cascades are cool, so heat-lovers like tomatoes, peppers and melons ripen slowly. Choose short-season varieties, give them the warmest, most sheltered spot, and consider a cloche or tunnel.
How accurate are these dates?
They are a careful first pass based on regional extension calendars (OSU and WSU). We are reviewing them with local sources before this region is finalized.