Chromo, CO frost dates
Last spring frostJun 9median date
First fall frostSep 22median date
Growing season105 daysfrost-free
Hardiness zone5bZone 5b
How Chromo compares
- In 8 years out of 10, the last spring frost in Chromo falls between May 25 and June 27, a 33-day window. The first fall frost falls between September 10 and October 1.
- The median last frost is 29 days later than the Colorado median of May 11.
- Its 105-day growing season is longer than 15% of the 374 Colorado places with a regular frost season (state median 146 days).
- The last frost is 39 days later than the zone 5b median of May 1. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 5b chart.
- The weather station records an average of 217 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 25 |
| 50% (median) | June 9 |
| 10% (safe for tender plants) | June 27 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 10 |
| 50% (median) | September 22 |
| 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 Chromo, CO
Chromo, CO frost dates — last frost Jun 9, first frost Sep 22, zone 5b. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Mar 17 to Mar 31Transplant outside: May 12 to May 26
Start indoors: Mar 31 to Apr 14Transplant outside: Jun 23 to Jul 7
Start indoors: Mar 31 to Apr 14Transplant outside: Jun 23 to Jul 7
Start indoors: Apr 14 to Apr 28Transplant outside: Jun 16 to Jun 30
Start indoors: Apr 14 to Apr 28Transplant outside: May 19 to Jun 2Sow outdoors: May 12 to Jun 16Plant for fall: Jul 28 to Aug 25
Start indoors: Apr 14 to Apr 28Transplant outside: May 12 to May 26Sow outdoors: May 12 to May 26Plant for fall: Jul 14 to Aug 4
Start indoors: Apr 14 to Apr 28Transplant outside: May 26 to Jun 9
Start indoors: Apr 14 to Apr 28Transplant outside: May 19 to Jun 2
Start indoors: Apr 14 to Apr 28Transplant outside: May 26 to Jun 9
Start indoors: Apr 28 to May 12Transplant outside: Jun 30 to Jul 14Sow outdoors: Jun 30 to Jul 14
Start indoors: Apr 28 to May 12Transplant outside: Jun 16 to Jun 30
Sow outdoors: Apr 28 to May 19Plant for fall: Jun 30 to Jul 21
Sow outdoors: Apr 28 to May 19Plant for fall: Jul 28 to Aug 18
Sow outdoors: May 5 to Jun 16Plant for fall: Aug 11 to Sep 1
Start indoors: May 12 to May 19Transplant outside: Jun 23 to Jun 30Sow outdoors: Jun 16 to Jun 30
Start indoors: May 12 to May 19Sow outdoors: Jun 16 to Jun 30
Start indoors: May 12 to May 19Sow outdoors: Jun 16 to Jun 30
Start indoors: May 12 to May 19Transplant outside: Jun 23 to Jul 7
Sow outdoors: May 19 to Jun 16
Sow outdoors: May 19 to Jun 16Plant for fall: Jul 14 to Jul 28
Sow outdoors: May 19 to Jun 9
Sow outdoors: May 26 to Jun 23Plant for fall: Jul 14 to Jul 28
Sow outdoors: May 26 to Jun 16Plant for fall: Jul 28 to Aug 18
Sow outdoors: Jun 16 to Jul 7
Sow outdoors: Jun 16 to Jun 30
Transplant outside: Jun 23 to Jul 14
Plant for fall: Sep 8 to Oct 13
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Chromo, CO
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Mar 17 – Mar 31 | May 12 – May 26 | — | — |
| Peppers | Mar 31 – Apr 14 | Jun 23 – Jul 7 | — | — |
| Eggplant | Mar 31 – Apr 14 | Jun 23 – Jul 7 | — | — |
| Tomatoes | Apr 14 – Apr 28 | Jun 16 – Jun 30 | — | — |
| Lettuce | Apr 14 – Apr 28 | May 19 – Jun 2 | May 12 – Jun 16 | Jul 28 – Aug 25 |
| Kale | Apr 14 – Apr 28 | May 12 – May 26 | May 12 – May 26 | Jul 14 – Aug 4 |
| Broccoli | Apr 14 – Apr 28 | May 26 – Jun 9 | — | — |
| Cabbage | Apr 14 – Apr 28 | May 19 – Jun 2 | — | — |
| Cauliflower | Apr 14 – Apr 28 | May 26 – Jun 9 | — | — |
| Okra | Apr 28 – May 12 | Jun 30 – Jul 14 | Jun 30 – Jul 14 | — |
| Basil | Apr 28 – May 12 | Jun 16 – Jun 30 | — | — |
| Peas | — | — | Apr 28 – May 19 | Jun 30 – Jul 21 |
| Spinach | — | — | Apr 28 – May 19 | Jul 28 – Aug 18 |
| Radishes | — | — | May 5 – Jun 16 | Aug 11 – Sep 1 |
| Cucumbers | May 12 – May 19 | Jun 23 – Jun 30 | Jun 16 – Jun 30 | — |
| Zucchini & Summer Squash | May 12 – May 19 | — | Jun 16 – Jun 30 | — |
| Winter Squash & Pumpkins Warning: Your frost-free season is about 105 days, which is tight for winter squash & pumpkins (100+ days). Choose early varieties and use transplants or row covers. | May 12 – May 19 | — | Jun 16 – Jun 30 | — |
| Melons & Watermelon | May 12 – May 19 | Jun 23 – Jul 7 | — | — |
| Carrots | — | — | May 19 – Jun 16 | — |
| Beets | — | — | May 19 – Jun 16 | Jul 14 – Jul 28 |
| Potatoes | — | — | May 19 – Jun 9 | — |
| Swiss Chard | — | — | May 26 – Jun 23 | Jul 14 – Jul 28 |
| Cilantro | — | — | May 26 – Jun 16 | Jul 28 – Aug 18 |
| Green Beans | — | — | Jun 16 – Jul 7 | — |
| Sweet Corn | — | — | Jun 16 – Jun 30 | — |
| Sweet Potatoes Warning: Your frost-free season is about 105 days, which is tight for sweet potatoes (100+ days). Choose early varieties and use transplants or row covers. | — | Jun 23 – Jul 14 | — | — |
| Garlic | — | — | — | Sep 8 – Oct 13 |
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 Dulce, NM weather station, 18 km away (elevation 6,795 ft (2,071 m)).
Frost dates near Chromo
- Pagosa Springs Jun 9 · Sep 22
- Arboles May 23 · Sep 29
- Capulin Jun 6 · Sep 15
- Ignacio May 23 · Sep 29
- Antonito May 28 · Sep 21
- Bayfield May 31 · Sep 26
- Conejos May 28 · Sep 21
- South Fork May 23 · Sep 25
- Romeo May 28 · Sep 21
- Del Norte May 23 · Sep 25
Frequently asked questions
When is the last frost in Chromo, CO?
The median last spring frost in Chromo, CO is June 9. There is still about a 10% chance of frost after June 27, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Chromo, CO?
The median first fall frost is September 22, with about a 10% chance of frost before September 10.
How long is the growing season in Chromo, CO?
About 105 days between the median last spring frost and first fall frost.
What planting zone is Chromo, CO?
Chromo, CO is in USDA hardiness zone 5b.