When should I plant cucumbers in Washington?

In Washington, cucumbers is typically planted between April 29 and June 3 (earliest April 22, latest June 24). Wait for soil temperature at 2-inch depth to reach 60°F.

What USDA hardiness zone is Washington?

Washington has a dominant USDA hardiness zone of 8a, with a range from 4b to 9a. Last frost date averages around April 15 and first fall frost around October 25, giving a typical 195-day growing season.

What soil temperature does cucumbers need to germinate?

Cucumbers requires a minimum soil temperature of 60°F at 2-inch depth for reliable germination. Optimal germination occurs at 65–85°F.

How long does cucumbers take to mature?

Cucumbers typically reaches maturity in 50–70 days, depending on variety. Direct seed once soil is reliably warm. Trellising significantly improves yield and reduces disease pressure.

State × crop calendar

Cucumbers planting in Washington.

Primary cropZone 8a195-day seasonLast frost April 15VegetableFrost Sensitive

Cucumbers planting in Washington is shaped by the state's 8a dominant hardiness zone, last frost date around April 15, and a 195-day growing season. Cucumbers is widely grown in Washington — commercially significant or common in home gardens and food plots.

Planting dates on this page are climatological estimates from USDA frost-date norms and zone-typical planting offsets. Verify against WSU Extension for variety- and county-specific guidance.

Planting calendar — 2026

Cucumbers · Washington · planting calendar

Ideal windowEarliest / latest tailsFrost zone

Planting windows shift earlier in southern parts of the state and later in northern parts. Use last frost date in your specific county as the reference.

Planting windows

Spring planting

Cucumbers

Earliest

April 22

Ideal start

April 29

Ideal end

June 3

Latest

June 24

Soil-temp triggerDirect seed when soil reaches 60°F at 2-inch depth. Cool soils slow germination dramatically.

Harvest window

Typical start

June 18

Typical end

July 8

Harvest timing varies with planting date and seasonal weather — these dates are typical for the ideal planting window.

Growing notes

Cucumbers grows well in Washington's typical climate. Washington's 195-day growing season and 8a hardiness zone support reliable production with appropriate variety selection.

Cucumbers is widely grown in Washington — commercially significant or common in home gardens and food plots.

Agronomy reference

Soil-temp minimum

60°F

Soil-temp optimum

65–85°F

Days to maturity

50–70

Water (in/wk)

1–2"

Soil pH

6–7

Nitrogen demand

moderate

Direct seed once soil is reliably warm. Trellising significantly improves yield and reduces disease pressure.

Common pests to watch

Cucumber beetles (striped and spotted)
Squash bugs
Pickleworm

Pest pressure varies by region and year. Confirm current outbreaks with WSU Extension.

Common diseases

Powdery mildew
Downy mildew
Bacterial wilt

Resistance varieties shift each year. Check the current variety trial report for your state.

Variety selection

Cucumbers varieties for Washington live with your extension service.

Variety performance is micro-regional and changes with each year’s trial cycle. We don’t republish variety lists — instead, we point directly at the source.

WSU Extension →

Search the extension site for “cucumbersvariety trial” or “recommended cucumbers varieties” to find the current report.

Yield varies significantly by variety, soil, fertility, and management. Consult your state extension service for variety performance trials in your region.

Cucumbers timing. Live alerts.

Bield: Farm ties weather and soil-temperature stations in your county to crop planting thresholds — get notified the day soil temp clears your target window.

Download Bield: Farm

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