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When to plant celery in Colorado

Colorado spans USDA zones 5b–7a, so the right time to plant celery shifts by weeks across the state. The window to transplant seedlings outdoors runs from about March 31 in Grand Junction to June 7 in Edwards — below are local dates for 70 cities, each computed from its own frost dates.

In Denverthe celery transplant out window (April 20–May 4) has passed for this year.
CityZoneLast frostFirst frostTransplant out
Denver6aMay 4October 8April 20 – May 4
Colorado Springs6aMay 3October 8April 19 – May 3
Aurora6aMay 7October 8April 23 – May 7
Fort Collins5bMay 2October 7April 18 – May 2
Lakewood6aMay 3October 7April 19 – May 3
Thornton6aMay 2October 11April 18 – May 2
Arvada6aMay 5October 5April 21 – May 5
Westminster6aMay 2October 11April 18 – May 2

Celery in Colorado: FAQ

When can I plant celery in Colorado?

Across Colorado, the time to transplant celery spans roughly March 31 in Grand Junction to June 7 in Edwards, each following that city's local frost dates.

Does the celery planting date vary across Colorado?

Yes. Colorado publishes 70 cities with their own frost dates, so the right celery planting window shifts by weeks between the warmest and coldest parts of the state — use your city's page for the exact dates.

How long does celery take to grow in Colorado?

Celery takes about 80–120 days to reach harvest once planted — check that this fits inside your city's frost-free season on its place page.

Planting reminders

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An email when it’s time to start seeds, transplant, and sow — timed to your frost dates. Double opt-in, one-click unsubscribe, no spam.

Celery planting guide →All Colorado cities →Colorado planting calendar →
When to Plant Celery in Colorado — Frost-Based Dates by City — BlissGarden