Edwards, CO planting zone & frost dates
Edwards is in USDA hardiness zone 5b. The last spring frost usually comes around June 6 and the first fall frost around September 14, for a growing season of about 98 days.
Planting calendar for Edwards
Dates are counted from the average last spring frost (June 6) using the typical timing recommended by U.S. extension services. Warm-season crops go out only after the danger of frost has passed and the soil has warmed.
| Crop | When |
|---|---|
| Tomatoes | Start seeds indoors: Apr 11 – Apr 25 Transplant outdoors: Jun 13 – Jun 20 |
| Peppers | Start seeds indoors: Mar 28 – Apr 11 Transplant outdoors: Jun 20 – Jun 27 |
| Eggplant | Start seeds indoors: Mar 28 – Apr 11 Transplant outdoors: Jun 20 – Jun 27 |
| Broccoli | Start seeds indoors: Mar 28 – Apr 11 Transplant outdoors: May 9 – May 23 |
| Cabbage | Start seeds indoors: Mar 28 – Apr 11 Transplant outdoors: May 9 – May 23 |
| Onions (sets) | Plant outdoors: May 9 – May 23 |
| Peas | Sow outdoors: Apr 25 – May 9 |
| Spinach | Sow outdoors: Apr 25 – May 9 |
| Lettuce | Sow outdoors: May 9 – May 23 |
| Carrots | Sow outdoors: May 9 – May 23 |
| Potatoes | Plant outdoors: May 9 – May 23 |
| Beans | Sow outdoors: Jun 13 – Jun 20 |
| Sweet corn | Sow outdoors: Jun 13 – Jun 20 |
| Cucumbers | Sow outdoors: Jun 13 – Jun 20 |
| Squash & zucchini | Sow outdoors: Jun 13 – Jun 20 |
| Basil | Start seeds indoors: Apr 25 – May 9 Transplant outdoors: Jun 13 – Jun 20 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Jul 20 (8 weeks before the average first fall frost on Sep 14).
Frost risk in detail
| 90% chance | 50% chance | 10% chance | |
|---|---|---|---|
| Last 32°F frost in spring is after | May 24 | Jun 6 | Jun 23 |
| First 32°F frost in fall is before | Sep 26 | Sep 14 | Aug 31 |
How to read it: in spring there is a 10% chance of a frost after June 23, so that is a safe date for tender plants. In fall there is a 10% chance of frost before August 31. A hard freeze (28°F) usually ends around May 22.
Hardiness zone by ZIP code in Edwards
- 81632 zone 5b
Nearby cities
- Steamboat Springs zone 4b, last frost Jun 9
- Boulder zone 6a, last frost May 6
- Golden zone 6a, last frost May 3
- Dakota Ridge zone 6a, last frost May 2
- Superior zone 6a, last frost May 6
- Ken Caryl zone 6a, last frost May 2
- Louisville zone 6a, last frost May 6
- Lakewood zone 6a, last frost May 3
Questions
What growing zone is Edwards, CO?
Edwards is in USDA Plant Hardiness Zone 5b (average extreme winter low -15°F to -10°F), according to the USDA 2023 map.
When is the last frost in Edwards?
The average last spring frost (32°F) in Edwards is June 6. There is still a 10% chance of frost until June 23.
When can I plant tomatoes in Edwards?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around Jun 13 – Jun 20. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station Green Mt Dam, CO (USC00053592), 34.3 km (21.3 mi) from the city center, elevation 2359 m, based on 17 years of records. Hardiness zone: USDA Plant Hardiness Zone Map 2023 for the ZIP code nearest to the city center. Microclimates (valleys, hills, cities, coasts) can be warmer or colder: check the local forecast before planting. How we calculate the data.