Walsenburg, CO frost dates
Last spring frostMay 6median date
First fall frostOct 4median date
Growing season151 daysfrost-free
Hardiness zone6aZone 6a
How Walsenburg compares
- In 8 years out of 10, the last spring frost in Walsenburg falls between April 24 and May 20, a 26-day window. The first fall frost falls between September 23 and October 17.
- The median last frost is 5 days earlier than the Colorado median of May 11.
- Its 151-day growing season is longer than 55% of the 374 Colorado places with a regular frost season (state median 146 days).
- The last frost is 7 days later than the zone 6a median of Apr 29. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 6a chart.
- The weather station records an average of 137 nights a year at or below 32°F.
- Compared with Pueblo, CO, 67 km away, the last frost here is 6 days later than there and the growing season is 11 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 24 |
| 50% (median) | May 6 |
| 10% (safe for tender plants) | May 20 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 23 |
| 50% (median) | October 4 |
| 90% (late) | October 17 |
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 Walsenburg, CO
Walsenburg, CO frost dates — last frost May 6, first frost Oct 4, zone 6a. whenisthelastfrost.com
Crop
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Start indoors: Feb 11 to Feb 25Transplant outside: Apr 8 to Apr 22
Start indoors: Feb 25 to Mar 11Transplant outside: May 20 to Jun 3
Start indoors: Feb 25 to Mar 11Transplant outside: May 20 to Jun 3
Start indoors: Mar 11 to Mar 25Transplant outside: May 13 to May 27
Start indoors: Mar 11 to Mar 25Transplant outside: Apr 15 to Apr 29Sow outdoors: Apr 8 to May 13Plant for fall: Aug 9 to Sep 6
Start indoors: Mar 11 to Mar 25Transplant outside: Apr 8 to Apr 22Sow outdoors: Apr 8 to Apr 22Plant for fall: Jul 26 to Aug 16
Start indoors: Mar 11 to Mar 25Transplant outside: Apr 22 to May 6Plant for fall: Jun 28 to Jul 19
Start indoors: Mar 11 to Mar 25Transplant outside: Apr 15 to Apr 29Plant for fall: Jun 28 to Jul 19
Start indoors: Mar 11 to Mar 25Transplant outside: Apr 22 to May 6Plant for fall: Jun 28 to Jul 19
Start indoors: Mar 25 to Apr 8Transplant outside: May 27 to Jun 10Sow outdoors: May 27 to Jun 10
Start indoors: Mar 25 to Apr 8Transplant outside: May 13 to May 27
Sow outdoors: Mar 25 to Apr 15Plant for fall: Jul 12 to Aug 2
Sow outdoors: Mar 25 to Apr 15Plant for fall: Aug 9 to Aug 30
Sow outdoors: Apr 1 to May 13Plant for fall: Aug 23 to Sep 13
Start indoors: Apr 8 to Apr 15Transplant outside: May 20 to May 27Sow outdoors: May 13 to May 27Plant for fall: Jul 19 to Aug 2
Start indoors: Apr 8 to Apr 15Sow outdoors: May 13 to May 27Plant for fall: Jul 26 to Aug 9
Start indoors: Apr 8 to Apr 15Sow outdoors: May 13 to May 27
Start indoors: Apr 8 to Apr 15Transplant outside: May 20 to Jun 3
Sow outdoors: Apr 15 to May 13Plant for fall: Jul 12 to Jul 26
Sow outdoors: Apr 15 to May 13Plant for fall: Jul 26 to Aug 9
Sow outdoors: Apr 15 to May 6
Sow outdoors: Apr 22 to May 20Plant for fall: Jul 26 to Aug 9
Sow outdoors: Apr 22 to May 13Plant for fall: Aug 9 to Aug 30
Sow outdoors: May 13 to Jun 3Plant for fall: Jul 19 to Aug 2
Sow outdoors: May 13 to May 27
Transplant outside: May 20 to Jun 10
Plant for fall: Sep 20 to Oct 25
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Walsenburg, CO
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 11 – Feb 25 | Apr 8 – Apr 22 | — | — |
| Peppers | Feb 25 – Mar 11 | May 20 – Jun 3 | — | — |
| Eggplant | Feb 25 – Mar 11 | May 20 – Jun 3 | — | — |
| Tomatoes | Mar 11 – Mar 25 | May 13 – May 27 | — | — |
| Lettuce | Mar 11 – Mar 25 | Apr 15 – Apr 29 | Apr 8 – May 13 | Aug 9 – Sep 6 |
| Kale | Mar 11 – Mar 25 | Apr 8 – Apr 22 | Apr 8 – Apr 22 | Jul 26 – Aug 16 |
| Broccoli | Mar 11 – Mar 25 | Apr 22 – May 6 | — | Jun 28 – Jul 19 |
| Cabbage | Mar 11 – Mar 25 | Apr 15 – Apr 29 | — | Jun 28 – Jul 19 |
| Cauliflower | Mar 11 – Mar 25 | Apr 22 – May 6 | — | Jun 28 – Jul 19 |
| Okra | Mar 25 – Apr 8 | May 27 – Jun 10 | May 27 – Jun 10 | — |
| Basil | Mar 25 – Apr 8 | May 13 – May 27 | — | — |
| Peas | — | — | Mar 25 – Apr 15 | Jul 12 – Aug 2 |
| Spinach | — | — | Mar 25 – Apr 15 | Aug 9 – Aug 30 |
| Radishes | — | — | Apr 1 – May 13 | Aug 23 – Sep 13 |
| Cucumbers | Apr 8 – Apr 15 | May 20 – May 27 | May 13 – May 27 | Jul 19 – Aug 2 |
| Zucchini & Summer Squash | Apr 8 – Apr 15 | — | May 13 – May 27 | Jul 26 – Aug 9 |
| Winter Squash & Pumpkins | Apr 8 – Apr 15 | — | May 13 – May 27 | — |
| Melons & Watermelon | Apr 8 – Apr 15 | May 20 – Jun 3 | — | — |
| Carrots | — | — | Apr 15 – May 13 | Jul 12 – Jul 26 |
| Beets | — | — | Apr 15 – May 13 | Jul 26 – Aug 9 |
| Potatoes | — | — | Apr 15 – May 6 | — |
| Swiss Chard | — | — | Apr 22 – May 20 | Jul 26 – Aug 9 |
| Cilantro | — | — | Apr 22 – May 13 | Aug 9 – Aug 30 |
| Green Beans | — | — | May 13 – Jun 3 | Jul 19 – Aug 2 |
| Sweet Corn | — | — | May 13 – May 27 | — |
| Sweet Potatoes | — | May 20 – Jun 10 | — | — |
| Garlic | — | — | — | Sep 20 – Oct 25 |
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 Walsenburg 1 Nw, CO weather station, 2 km away (elevation 6,293 ft (1,918 m)).
Frost dates near Walsenburg
- La Veta May 6 · Oct 4
- Aguilar May 6 · Oct 4
- Colorado City May 5 · Oct 10
- Rye May 5 · Oct 10
- Gardner May 27 · Sep 25
- Trinidad Apr 30 · Oct 15
- Boncarbo May 11 · Oct 4
- Model May 4 · Oct 9
- Beulah May 5 · Oct 10
- Weston May 11 · Oct 4
Frequently asked questions
When is the last frost in Walsenburg, CO?
The median last spring frost in Walsenburg, CO is May 6. There is still about a 10% chance of frost after May 20, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Walsenburg, CO?
The median first fall frost is October 4, with about a 10% chance of frost before September 23.
How long is the growing season in Walsenburg, CO?
About 151 days between the median last spring frost and first fall frost.
What planting zone is Walsenburg, CO?
Walsenburg, CO is in USDA hardiness zone 6a.