Sedalia, CO frost dates
Last spring frostMay 16median date
First fall frostOct 1median date
Growing season138 daysfrost-free
Hardiness zone5bZone 5b
How Sedalia compares
- In 8 years out of 10, the last spring frost in Sedalia falls between May 2 and June 1, a 30-day window. The first fall frost falls between September 17 and October 15.
- The median last frost is 5 days later than the Colorado median of May 11.
- Its 138-day growing season is longer than 41% of the 374 Colorado places with a regular frost season (state median 146 days).
- The last frost is 15 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 165 nights a year at or below 32°F.
- Compared with Castle Rock, CO, 19 km away, the last frost here is 7 days later than there and the growing season is 8 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | May 2 |
| 50% (median) | May 16 |
| 10% (safe for tender plants) | June 1 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 17 |
| 50% (median) | October 1 |
| 90% (late) | October 15 |
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 Sedalia, CO
Sedalia, CO frost dates — last frost May 16, first frost Oct 1, zone 5b. whenisthelastfrost.com
Crop
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Start indoors: Feb 21 to Mar 7Transplant outside: Apr 18 to May 2
Start indoors: Mar 7 to Mar 21Transplant outside: May 30 to Jun 13
Start indoors: Mar 7 to Mar 21Transplant outside: May 30 to Jun 13
Start indoors: Mar 21 to Apr 4Transplant outside: May 23 to Jun 6
Start indoors: Mar 21 to Apr 4Transplant outside: Apr 25 to May 9Sow outdoors: Apr 18 to May 23Plant for fall: Aug 6 to Sep 3
Start indoors: Mar 21 to Apr 4Transplant outside: Apr 18 to May 2Sow outdoors: Apr 18 to May 2Plant for fall: Jul 23 to Aug 13
Start indoors: Mar 21 to Apr 4Transplant outside: May 2 to May 16Plant for fall: Jun 25 to Jul 16
Start indoors: Mar 21 to Apr 4Transplant outside: Apr 25 to May 9Plant for fall: Jun 25 to Jul 16
Start indoors: Mar 21 to Apr 4Transplant outside: May 2 to May 16Plant for fall: Jun 25 to Jul 16
Start indoors: Apr 4 to Apr 18Transplant outside: Jun 6 to Jun 20Sow outdoors: Jun 6 to Jun 20
Start indoors: Apr 4 to Apr 18Transplant outside: May 23 to Jun 6
Sow outdoors: Apr 4 to Apr 25Plant for fall: Jul 9 to Jul 30
Sow outdoors: Apr 4 to Apr 25Plant for fall: Aug 6 to Aug 27
Sow outdoors: Apr 11 to May 23Plant for fall: Aug 20 to Sep 10
Start indoors: Apr 18 to Apr 25Transplant outside: May 30 to Jun 6Sow outdoors: May 23 to Jun 6Plant for fall: Jul 16 to Jul 30
Start indoors: Apr 18 to Apr 25Sow outdoors: May 23 to Jun 6Plant for fall: Jul 23 to Aug 6
Start indoors: Apr 18 to Apr 25Sow outdoors: May 23 to Jun 6
Start indoors: Apr 18 to Apr 25Transplant outside: May 30 to Jun 13
Sow outdoors: Apr 25 to May 23Plant for fall: Jul 9 to Jul 23
Sow outdoors: Apr 25 to May 23Plant for fall: Jul 23 to Aug 6
Sow outdoors: Apr 25 to May 16
Sow outdoors: May 2 to May 30Plant for fall: Jul 23 to Aug 6
Sow outdoors: May 2 to May 23Plant for fall: Aug 6 to Aug 27
Sow outdoors: May 23 to Jun 13Plant for fall: Jul 16 to Jul 30
Sow outdoors: May 23 to Jun 6
Transplant outside: May 30 to Jun 20
Plant for fall: Sep 17 to Oct 22
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Sedalia, CO
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 21 – Mar 7 | Apr 18 – May 2 | — | — |
| Peppers | Mar 7 – Mar 21 | May 30 – Jun 13 | — | — |
| Eggplant | Mar 7 – Mar 21 | May 30 – Jun 13 | — | — |
| Tomatoes | Mar 21 – Apr 4 | May 23 – Jun 6 | — | — |
| Lettuce | Mar 21 – Apr 4 | Apr 25 – May 9 | Apr 18 – May 23 | Aug 6 – Sep 3 |
| Kale | Mar 21 – Apr 4 | Apr 18 – May 2 | Apr 18 – May 2 | Jul 23 – Aug 13 |
| Broccoli | Mar 21 – Apr 4 | May 2 – May 16 | — | Jun 25 – Jul 16 |
| Cabbage | Mar 21 – Apr 4 | Apr 25 – May 9 | — | Jun 25 – Jul 16 |
| Cauliflower | Mar 21 – Apr 4 | May 2 – May 16 | — | Jun 25 – Jul 16 |
| Okra | Apr 4 – Apr 18 | Jun 6 – Jun 20 | Jun 6 – Jun 20 | — |
| Basil | Apr 4 – Apr 18 | May 23 – Jun 6 | — | — |
| Peas | — | — | Apr 4 – Apr 25 | Jul 9 – Jul 30 |
| Spinach | — | — | Apr 4 – Apr 25 | Aug 6 – Aug 27 |
| Radishes | — | — | Apr 11 – May 23 | Aug 20 – Sep 10 |
| Cucumbers | Apr 18 – Apr 25 | May 30 – Jun 6 | May 23 – Jun 6 | Jul 16 – Jul 30 |
| Zucchini & Summer Squash | Apr 18 – Apr 25 | — | May 23 – Jun 6 | Jul 23 – Aug 6 |
| Winter Squash & Pumpkins | Apr 18 – Apr 25 | — | May 23 – Jun 6 | — |
| Melons & Watermelon | Apr 18 – Apr 25 | May 30 – Jun 13 | — | — |
| Carrots | — | — | Apr 25 – May 23 | Jul 9 – Jul 23 |
| Beets | — | — | Apr 25 – May 23 | Jul 23 – Aug 6 |
| Potatoes | — | — | Apr 25 – May 16 | — |
| Swiss Chard | — | — | May 2 – May 30 | Jul 23 – Aug 6 |
| Cilantro | — | — | May 2 – May 23 | Aug 6 – Aug 27 |
| Green Beans | — | — | May 23 – Jun 13 | Jul 16 – Jul 30 |
| Sweet Corn | — | — | May 23 – Jun 6 | — |
| Sweet Potatoes | — | May 30 – Jun 20 | — | — |
| Garlic | — | — | — | Sep 17 – Oct 22 |
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 Roxborough Sp, CO weather station, 13 km away (elevation 6,119 ft (1,865 m)).
Frost dates near Sedalia
- Louviers May 16 · Oct 1
- Buffalo Creek May 16 · Sep 29
- Castle Rock May 9 · Oct 2
- Larkspur May 14 · Oct 1
- Palmer Lake May 14 · Oct 1
- Littleton May 2 · Oct 11
- Monument May 14 · Oct 1
- Franktown May 16 · Oct 2
- Lone Tree May 5 · Oct 8
- Pine Jun 16 · Sep 8
Frequently asked questions
When is the last frost in Sedalia, CO?
The median last spring frost in Sedalia, CO is May 16. There is still about a 10% chance of frost after June 1, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Sedalia, CO?
The median first fall frost is October 1, with about a 10% chance of frost before September 17.
How long is the growing season in Sedalia, CO?
About 138 days between the median last spring frost and first fall frost.
What planting zone is Sedalia, CO?
Sedalia, CO is in USDA hardiness zone 5b.