Hartsel, CO frost dates
Last spring frostAny monthno frost-free season
Freezing nights263 / yrat or below 32°F
Hardiness zone4aZone 4a
Gardening where frost is possible all year
The weather station nearest Hartsel, CO records freezing temperatures in every month often enough that NOAA cannot define a frost-free season. Gardening is still possible — it just means planning for frost at any time:
- Grow fast, cold-tolerant crops: Radishes, Lettuce, Spinach, Kale, Peas, Potatoes, Swiss Chard, Garlic.
- Plant once the soil can be worked — usually late spring to early summer at high elevation — and keep row covers ready for clear, still nights.
- Use season extension: cold frames, low tunnels, wall-of-water cloches or a greenhouse turn a few frost-free weeks into a real season.
- Frost-tender crops (tomatoes, squash, beans) need protection all season; choose the earliest varieties you can find.
How Hartsel compares
- Nearby Colorado Springs, CO, 97 km away, has a regular frost season (last frost May 3), a reminder of how much elevation and distance from the coast matter.
About these dates
Based on 1991–2020 NOAA climate normals for the Antero Rsvr, CO weather station, 3 km away (elevation 8,940 ft (2,725 m)).
Frost dates near Hartsel
- Como Jun 16 · Sep 9
- Buena Vista May 27 · Sep 23
- Fairplay Jun 16 · Sep 9
- Guffey Jun 2 · Sep 19
- Granite Jun 16 · Sep 10
- Nathrop May 27 · Sep 23
- Jefferson Jun 15 · Sep 9
- Alma Jun 16 · Sep 9
- Lake George Jun 2 · Sep 19
- Climax frost any month
Frequently asked questions
When is the last frost in Hartsel, CO?
Hartsel, CO can freeze in any month, so there is no reliable last frost date. The nearest NOAA station averages 263 nights a year at or below 32°F.
What can I grow in Hartsel, CO?
Fast, cold-tolerant crops such as radishes, lettuce, spinach, kale, peas and potatoes, ideally under row covers, cold frames or a greenhouse. Frost-tender crops like tomatoes need protection all season.