Ignacio, CO frost dates
Last spring frostMay 23median date
First fall frostSep 29median date
Growing season129 daysfrost-free
Hardiness zone6aZone 6a
How Ignacio compares
- In 8 years out of 10, the last spring frost in Ignacio falls between May 9 and June 7, a 29-day window. The first fall frost falls between September 18 and October 11.
- The median last frost is 12 days later than the Colorado median of May 11.
- Its 129-day growing season is longer than 34% of the 374 Colorado places with a regular frost season (state median 146 days).
- The last frost is 24 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 202 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 9 |
| 50% (median) | May 23 |
| 10% (safe for tender plants) | June 7 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 18 |
| 50% (median) | September 29 |
| 90% (late) | October 11 |
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 Ignacio, CO
Ignacio, CO frost dates — last frost May 23, first frost Sep 29, zone 6a. whenisthelastfrost.com
Crop
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Start indoors: Feb 28 to Mar 14Transplant outside: Apr 25 to May 9
Start indoors: Mar 14 to Mar 28Transplant outside: Jun 6 to Jun 20
Start indoors: Mar 14 to Mar 28Transplant outside: Jun 6 to Jun 20
Start indoors: Mar 28 to Apr 11Transplant outside: May 30 to Jun 13
Start indoors: Mar 28 to Apr 11Transplant outside: May 2 to May 16Sow outdoors: Apr 25 to May 30Plant for fall: Aug 4 to Sep 1
Start indoors: Mar 28 to Apr 11Transplant outside: Apr 25 to May 9Sow outdoors: Apr 25 to May 9Plant for fall: Jul 21 to Aug 11
Start indoors: Mar 28 to Apr 11Transplant outside: May 9 to May 23Plant for fall: Jun 23 to Jul 14
Start indoors: Mar 28 to Apr 11Transplant outside: May 2 to May 16Plant for fall: Jun 23 to Jul 14
Start indoors: Mar 28 to Apr 11Transplant outside: May 9 to May 23Plant for fall: Jun 23 to Jul 14
Start indoors: Apr 11 to Apr 25Transplant outside: Jun 13 to Jun 27Sow outdoors: Jun 13 to Jun 27
Start indoors: Apr 11 to Apr 25Transplant outside: May 30 to Jun 13
Sow outdoors: Apr 11 to May 2Plant for fall: Jul 7 to Jul 28
Sow outdoors: Apr 11 to May 2Plant for fall: Aug 4 to Aug 25
Sow outdoors: Apr 18 to May 30Plant for fall: Aug 18 to Sep 8
Start indoors: Apr 25 to May 2Transplant outside: Jun 6 to Jun 13Sow outdoors: May 30 to Jun 13Plant for fall: Jul 14 to Jul 28
Start indoors: Apr 25 to May 2Sow outdoors: May 30 to Jun 13Plant for fall: Jul 21 to Aug 4
Start indoors: Apr 25 to May 2Sow outdoors: May 30 to Jun 13
Start indoors: Apr 25 to May 2Transplant outside: Jun 6 to Jun 20
Sow outdoors: May 2 to May 30Plant for fall: Jul 7 to Jul 21
Sow outdoors: May 2 to May 30Plant for fall: Jul 21 to Aug 4
Sow outdoors: May 2 to May 23
Sow outdoors: May 9 to Jun 6Plant for fall: Jul 21 to Aug 4
Sow outdoors: May 9 to May 30Plant for fall: Aug 4 to Aug 25
Sow outdoors: May 30 to Jun 20Plant for fall: Jul 14 to Jul 28
Sow outdoors: May 30 to Jun 13
Transplant outside: Jun 6 to Jun 27
Plant for fall: Sep 15 to Oct 20
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Ignacio, CO
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 28 – Mar 14 | Apr 25 – May 9 | — | — |
| Peppers | Mar 14 – Mar 28 | Jun 6 – Jun 20 | — | — |
| Eggplant | Mar 14 – Mar 28 | Jun 6 – Jun 20 | — | — |
| Tomatoes | Mar 28 – Apr 11 | May 30 – Jun 13 | — | — |
| Lettuce | Mar 28 – Apr 11 | May 2 – May 16 | Apr 25 – May 30 | Aug 4 – Sep 1 |
| Kale | Mar 28 – Apr 11 | Apr 25 – May 9 | Apr 25 – May 9 | Jul 21 – Aug 11 |
| Broccoli | Mar 28 – Apr 11 | May 9 – May 23 | — | Jun 23 – Jul 14 |
| Cabbage | Mar 28 – Apr 11 | May 2 – May 16 | — | Jun 23 – Jul 14 |
| Cauliflower | Mar 28 – Apr 11 | May 9 – May 23 | — | Jun 23 – Jul 14 |
| Okra | Apr 11 – Apr 25 | Jun 13 – Jun 27 | Jun 13 – Jun 27 | — |
| Basil | Apr 11 – Apr 25 | May 30 – Jun 13 | — | — |
| Peas | — | — | Apr 11 – May 2 | Jul 7 – Jul 28 |
| Spinach | — | — | Apr 11 – May 2 | Aug 4 – Aug 25 |
| Radishes | — | — | Apr 18 – May 30 | Aug 18 – Sep 8 |
| Cucumbers | Apr 25 – May 2 | Jun 6 – Jun 13 | May 30 – Jun 13 | Jul 14 – Jul 28 |
| Zucchini & Summer Squash | Apr 25 – May 2 | — | May 30 – Jun 13 | Jul 21 – Aug 4 |
| Winter Squash & Pumpkins | Apr 25 – May 2 | — | May 30 – Jun 13 | — |
| Melons & Watermelon | Apr 25 – May 2 | Jun 6 – Jun 20 | — | — |
| Carrots | — | — | May 2 – May 30 | Jul 7 – Jul 21 |
| Beets | — | — | May 2 – May 30 | Jul 21 – Aug 4 |
| Potatoes | — | — | May 2 – May 23 | — |
| Swiss Chard | — | — | May 9 – Jun 6 | Jul 21 – Aug 4 |
| Cilantro | — | — | May 9 – May 30 | Aug 4 – Aug 25 |
| Green Beans | — | — | May 30 – Jun 20 | Jul 14 – Jul 28 |
| Sweet Corn | — | — | May 30 – Jun 13 | — |
| Sweet Potatoes | — | Jun 6 – Jun 27 | — | — |
| Garlic | — | — | — | Sep 15 – Oct 20 |
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 Ignacio 6ese, CO weather station, 10 km away (elevation 6,549 ft (1,996 m)).
Frost dates near Ignacio
- Bayfield May 31 · Sep 26
- Arboles May 23 · Sep 29
- Durango May 21 · Oct 2
- Hesperus Jun 1 · Sep 27
- Marvel Jun 1 · Sep 27
- Pagosa Springs Jun 9 · Sep 22
- Mancos Jun 4 · Sep 24
- Chromo Jun 9 · Sep 22
- Rico frost any month
- Mesa Verde National Park May 6 · Oct 14
Frequently asked questions
When is the last frost in Ignacio, CO?
The median last spring frost in Ignacio, CO is May 23. There is still about a 10% chance of frost after June 7, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Ignacio, CO?
The median first fall frost is September 29, with about a 10% chance of frost before September 18.
How long is the growing season in Ignacio, CO?
About 129 days between the median last spring frost and first fall frost.
What planting zone is Ignacio, CO?
Ignacio, CO is in USDA hardiness zone 6a.