Frost dates for Denver, Colorado
In a typical year, Denver’s last spring frost lands around Apr 30 and the first fall frost around Oct 12, a growing season of about 165 days. These are odds drawn from 30-year NOAA climate normals, not a promise. USDA zone 6a.
| Odds | Last spring frost | First fall frost |
|---|---|---|
| 10 percent | Apr 15 | Sep 28 |
| 50 percent | Apr 30 | Oct 12 |
| 90 percent | May 13 | Oct 26 |
A 10 percent year is an early year, a 90 percent year a late one. Frost-sensitive planting usually waits for the 90 percent side of the last-frost band.
Soil in Denver is typically around 75°F at 4 inches this time of year, estimated from the last two weeks of normal air temperatures.
Plantable now in Denver
- Chinese cabbage (Bilko)
- Arugula (Astro)
- Mustard greens (Red Giant)
- Tatsoi (Tatsoi)
- Radish (Cherry Belle)
- Beet (Detroit Dark Red)
- Spinach (Space)
- Swiss chard (Bright Lights)
Timing comes from the same temperature engine the app uses, run against Denver’s normals for today.
Nearby cities
- Arvada, CO (around May 5 to Oct 5)
- Westminster, CO (around May 2 to Oct 11)
- Thornton, CO (around May 2 to Oct 11)
- Aurora, CO (around May 4 to Oct 8)
- Fort Collins, CO (around May 2 to Oct 7)
Row & Bed is a plant reference built around your garden: your zone, your frost dates, your forecast, and a cited page for every variety in your beds.
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