Conejos, CO frost dates
Last spring frostMay 28median date
First fall frostSep 21median date
Growing season116 daysfrost-free
Hardiness zone5aZone 5a
How Conejos compares
- In 8 years out of 10, the last spring frost in Conejos falls between May 13 and June 11, a 29-day window. The first fall frost falls between September 9 and October 1.
- The median last frost is 17 days later than the Colorado median of May 11.
- Its 116-day growing season is longer than 26% of the 374 Colorado places with a regular frost season (state median 146 days).
- The last frost is 25 days later than the zone 5a median of May 3. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 5a chart.
- The weather station records an average of 206 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 13 |
| 50% (median) | May 28 |
| 10% (safe for tender plants) | June 11 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 9 |
| 50% (median) | September 21 |
| 90% (late) | October 1 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for Conejos, CO
Conejos, CO frost dates — last frost May 28, first frost Sep 21, zone 5a. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Mar 5 to Mar 19Transplant outside: Apr 30 to May 14
Start indoors: Mar 19 to Apr 2Transplant outside: Jun 11 to Jun 25
Start indoors: Mar 19 to Apr 2Transplant outside: Jun 11 to Jun 25
Start indoors: Apr 2 to Apr 16Transplant outside: Jun 4 to Jun 18
Start indoors: Apr 2 to Apr 16Transplant outside: May 7 to May 21Sow outdoors: Apr 30 to Jun 4Plant for fall: Jul 27 to Aug 24
Start indoors: Apr 2 to Apr 16Transplant outside: Apr 30 to May 14Sow outdoors: Apr 30 to May 14Plant for fall: Jul 13 to Aug 3
Start indoors: Apr 2 to Apr 16Transplant outside: May 14 to May 28Plant for fall: Jun 15 to Jul 6
Start indoors: Apr 2 to Apr 16Transplant outside: May 7 to May 21Plant for fall: Jun 15 to Jul 6
Start indoors: Apr 2 to Apr 16Transplant outside: May 14 to May 28Plant for fall: Jun 15 to Jul 6
Start indoors: Apr 16 to Apr 30Transplant outside: Jun 18 to Jul 2Sow outdoors: Jun 18 to Jul 2
Start indoors: Apr 16 to Apr 30Transplant outside: Jun 4 to Jun 18
Sow outdoors: Apr 16 to May 7Plant for fall: Jun 29 to Jul 20
Sow outdoors: Apr 16 to May 7Plant for fall: Jul 27 to Aug 17
Sow outdoors: Apr 23 to Jun 4Plant for fall: Aug 10 to Aug 31
Start indoors: Apr 30 to May 7Transplant outside: Jun 11 to Jun 18Sow outdoors: Jun 4 to Jun 18Plant for fall: Jul 6 to Jul 20
Start indoors: Apr 30 to May 7Sow outdoors: Jun 4 to Jun 18Plant for fall: Jul 13 to Jul 27
Start indoors: Apr 30 to May 7Sow outdoors: Jun 4 to Jun 18
Start indoors: Apr 30 to May 7Transplant outside: Jun 11 to Jun 25
Sow outdoors: May 7 to Jun 4Plant for fall: Jun 29 to Jul 13
Sow outdoors: May 7 to Jun 4Plant for fall: Jul 13 to Jul 27
Sow outdoors: May 7 to May 28
Sow outdoors: May 14 to Jun 11Plant for fall: Jul 13 to Jul 27
Sow outdoors: May 14 to Jun 4Plant for fall: Jul 27 to Aug 17
Sow outdoors: Jun 4 to Jun 25
Sow outdoors: Jun 4 to Jun 18
Transplant outside: Jun 11 to Jul 2
Plant for fall: Sep 7 to Oct 12
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Conejos, CO
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Mar 5 – Mar 19 | Apr 30 – May 14 | — | — |
| Peppers | Mar 19 – Apr 2 | Jun 11 – Jun 25 | — | — |
| Eggplant | Mar 19 – Apr 2 | Jun 11 – Jun 25 | — | — |
| Tomatoes | Apr 2 – Apr 16 | Jun 4 – Jun 18 | — | — |
| Lettuce | Apr 2 – Apr 16 | May 7 – May 21 | Apr 30 – Jun 4 | Jul 27 – Aug 24 |
| Kale | Apr 2 – Apr 16 | Apr 30 – May 14 | Apr 30 – May 14 | Jul 13 – Aug 3 |
| Broccoli | Apr 2 – Apr 16 | May 14 – May 28 | — | Jun 15 – Jul 6 |
| Cabbage | Apr 2 – Apr 16 | May 7 – May 21 | — | Jun 15 – Jul 6 |
| Cauliflower | Apr 2 – Apr 16 | May 14 – May 28 | — | Jun 15 – Jul 6 |
| Okra | Apr 16 – Apr 30 | Jun 18 – Jul 2 | Jun 18 – Jul 2 | — |
| Basil | Apr 16 – Apr 30 | Jun 4 – Jun 18 | — | — |
| Peas | — | — | Apr 16 – May 7 | Jun 29 – Jul 20 |
| Spinach | — | — | Apr 16 – May 7 | Jul 27 – Aug 17 |
| Radishes | — | — | Apr 23 – Jun 4 | Aug 10 – Aug 31 |
| Cucumbers | Apr 30 – May 7 | Jun 11 – Jun 18 | Jun 4 – Jun 18 | Jul 6 – Jul 20 |
| Zucchini & Summer Squash | Apr 30 – May 7 | — | Jun 4 – Jun 18 | Jul 13 – Jul 27 |
| Winter Squash & Pumpkins | Apr 30 – May 7 | — | Jun 4 – Jun 18 | — |
| Melons & Watermelon | Apr 30 – May 7 | Jun 11 – Jun 25 | — | — |
| Carrots | — | — | May 7 – Jun 4 | Jun 29 – Jul 13 |
| Beets | — | — | May 7 – Jun 4 | Jul 13 – Jul 27 |
| Potatoes | — | — | May 7 – May 28 | — |
| Swiss Chard | — | — | May 14 – Jun 11 | Jul 13 – Jul 27 |
| Cilantro | — | — | May 14 – Jun 4 | Jul 27 – Aug 17 |
| Green Beans | — | — | Jun 4 – Jun 25 | — |
| Sweet Corn | — | — | Jun 4 – Jun 18 | — |
| Sweet Potatoes | — | Jun 11 – Jul 2 | — | — |
| Garlic | — | — | — | Sep 7 – Oct 12 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the Manassa, CO weather station, 11 km away (elevation 7,694 ft (2,345 m)).
Frost dates near Conejos
- Antonito May 28 · Sep 21
- Romeo May 28 · Sep 21
- Manassa May 28 · Sep 21
- Sanford May 28 · Sep 21
- La Jara May 28 · Sep 21
- Capulin Jun 6 · Sep 15
- Jaroso May 31 · Sep 23
- Alamosa May 30 · Sep 17
- San Luis May 31 · Sep 23
- Homelake Jun 11 · Sep 13
Frequently asked questions
When is the last frost in Conejos, CO?
The median last spring frost in Conejos, CO is May 28. There is still about a 10% chance of frost after June 11, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Conejos, CO?
The median first fall frost is September 21, with about a 10% chance of frost before September 9.
How long is the growing season in Conejos, CO?
About 116 days between the median last spring frost and first fall frost.
What planting zone is Conejos, CO?
Conejos, CO is in USDA hardiness zone 5a.