🥦 Can I Plant Cauliflower in Spokane, WA?

2026 planting guide for Zone 6b · Last frost ~April 22 · Growing season ~172 days

✅ YES — Good temps, but watch for heat — highs near 94°F

Temperature conditions are suitable for Cauliflower. Highs near 94°F are on the warm side — make sure plants have plenty of water.

Planting window: Jul 2 – Jul 16
Good to go — plant now while conditions are right.
Live result based on current forecast for Spokane, WA · Updates every 6 hours
USDA Zone
6b
Last Spring Frost
~April 22
First Fall Frost
October 11
Growing Season
~172 days
Ideal Temp for Cauliflower
45–65°F
Frost Risk
✅ Tolerant

Growing Cauliflower in Spokane

Spokane's Zone 6b inland Pacific Northwest climate differs significantly from Seattle's — less rain, more sun, and more extreme temperature swings. The Palouse region's continental climate means hot, dry summers ideal for tomatoes and peppers (a welcome contrast to rainy western Washington). The frost-free window of about 171 days is adequate for a wide range of crops when warm-season starts begin indoors in late March.

In Spokane (last frost around April 22), cauliflower can go out around March — approximately 6 weeks before the last expected frost, making it an early-season opportunity. Starting seeds indoors 6 weeks before the last frost date gives you a significant head start.

Cauliflower thrives between 45°F and 65°F. It tolerates temperatures as low as 28°F, making it a candidate for early spring planting before the last frost date. Expect 85–100 days from transplant to first harvest. Needs steady cool temps. Finicky.

Frequently Asked Questions

When can I plant cauliflower in Spokane, WA?

In Spokane (last frost around April 22), cauliflower can go out around March — approximately 6 weeks before the last expected frost, making it an early-season opportunity. For best results, start seeds indoors 6 weeks before that — giving you strong transplants ready to go out at the right time.

What is the USDA hardiness zone for Spokane?

Spokane, WA is in USDA Plant Hardiness Zone 6b. The last expected spring frost is around April 22, and the first fall frost arrives around October 11. This zone classification helps you understand which perennials survive winter and when annual vegetables can safely go outdoors.

Is it safe to plant cauliflower outside in Spokane right now?

That depends on the current weather forecast. Cauliflower needs temperatures above 28°F (ideally 45–65°F) to thrive. CanIPlant checks your real 7-day forecast and any active frost alerts to give you a live YES, NO, or WAIT answer — just enter your ZIP code.

Can I grow cauliflower in Spokane 2026?

Yes — Cauliflower grows well in Spokane, WA. With a Zone 6b climate and a growing season of ~172 days, Spokane is well-suited for cool-season crops like cauliflower. As a frost-tolerant crop, cauliflower can even go out a few weeks before the last frost date.

Grow Cauliflower in Other Cities

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