Sedgwick, CO frost dates
Last spring frostMay 6median date
First fall frostOct 7median date
Growing season154 daysfrost-free
Hardiness zone5bZone 5b
How Sedgwick compares
- In 8 years out of 10, the last spring frost in Sedgwick falls between April 24 and May 18, a 24-day window. The first fall frost falls between September 24 and October 19.
- The median last frost is 5 days earlier than the Colorado median of May 11.
- Its 154-day growing season is longer than 63% of the 374 Colorado places with a regular frost season (state median 146 days).
- The last frost is 5 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 157 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 24 |
| 50% (median) | May 6 |
| 10% (safe for tender plants) | May 18 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 24 |
| 50% (median) | October 7 |
| 90% (late) | October 19 |
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 Sedgwick, CO
Sedgwick, CO frost dates — last frost May 6, first frost Oct 7, zone 5b. 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 12 to Sep 9
Start indoors: Mar 11 to Mar 25Transplant outside: Apr 8 to Apr 22Sow outdoors: Apr 8 to Apr 22Plant for fall: Jul 29 to Aug 19
Start indoors: Mar 11 to Mar 25Transplant outside: Apr 22 to May 6Plant for fall: Jul 1 to Jul 22
Start indoors: Mar 11 to Mar 25Transplant outside: Apr 15 to Apr 29Plant for fall: Jul 1 to Jul 22
Start indoors: Mar 11 to Mar 25Transplant outside: Apr 22 to May 6Plant for fall: Jul 1 to Jul 22
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 15 to Aug 5
Sow outdoors: Mar 25 to Apr 15Plant for fall: Aug 12 to Sep 2
Sow outdoors: Apr 1 to May 13Plant for fall: Aug 26 to Sep 16
Start indoors: Apr 8 to Apr 15Transplant outside: May 20 to May 27Sow outdoors: May 13 to May 27Plant for fall: Jul 22 to Aug 5
Start indoors: Apr 8 to Apr 15Sow outdoors: May 13 to May 27Plant for fall: Jul 29 to Aug 12
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 15 to Jul 29
Sow outdoors: Apr 15 to May 13Plant for fall: Jul 29 to Aug 12
Sow outdoors: Apr 15 to May 6
Sow outdoors: Apr 22 to May 20Plant for fall: Jul 29 to Aug 12
Sow outdoors: Apr 22 to May 13Plant for fall: Aug 12 to Sep 2
Sow outdoors: May 13 to Jun 3Plant for fall: Jul 22 to Aug 5
Sow outdoors: May 13 to May 27
Transplant outside: May 20 to Jun 10
Plant for fall: Sep 23 to Oct 28
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Sedgwick, 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 12 – Sep 9 |
| Kale | Mar 11 – Mar 25 | Apr 8 – Apr 22 | Apr 8 – Apr 22 | Jul 29 – Aug 19 |
| Broccoli | Mar 11 – Mar 25 | Apr 22 – May 6 | — | Jul 1 – Jul 22 |
| Cabbage | Mar 11 – Mar 25 | Apr 15 – Apr 29 | — | Jul 1 – Jul 22 |
| Cauliflower | Mar 11 – Mar 25 | Apr 22 – May 6 | — | Jul 1 – Jul 22 |
| 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 15 – Aug 5 |
| Spinach | — | — | Mar 25 – Apr 15 | Aug 12 – Sep 2 |
| Radishes | — | — | Apr 1 – May 13 | Aug 26 – Sep 16 |
| Cucumbers | Apr 8 – Apr 15 | May 20 – May 27 | May 13 – May 27 | Jul 22 – Aug 5 |
| Zucchini & Summer Squash | Apr 8 – Apr 15 | — | May 13 – May 27 | Jul 29 – Aug 12 |
| 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 15 – Jul 29 |
| Beets | — | — | Apr 15 – May 13 | Jul 29 – Aug 12 |
| Potatoes | — | — | Apr 15 – May 6 | — |
| Swiss Chard | — | — | Apr 22 – May 20 | Jul 29 – Aug 12 |
| Cilantro | — | — | Apr 22 – May 13 | Aug 12 – Sep 2 |
| Green Beans | — | — | May 13 – Jun 3 | Jul 22 – Aug 5 |
| Sweet Corn | — | — | May 13 – May 27 | — |
| Sweet Potatoes | — | May 20 – Jun 10 | — | — |
| Garlic | — | — | — | Sep 23 – Oct 28 |
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 Sedgwick 5 S, CO weather station, 5 km away (elevation 3,996 ft (1,218 m)).
Frost dates near Sedgwick
- Ovid May 7 · Oct 6
- Julesburg May 7 · Oct 6
- Crook May 11 · Oct 4
- Haxtun May 4 · Oct 11
- Paoli May 11 · Oct 3
- Amherst May 11 · Oct 3
- Fleming May 4 · Oct 11
- Holyoke May 11 · Oct 3
- Peetz May 15 · Sep 30
- Iliff Apr 30 · Oct 9
Frequently asked questions
When is the last frost in Sedgwick, CO?
The median last spring frost in Sedgwick, CO is May 6. There is still about a 10% chance of frost after May 18, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Sedgwick, CO?
The median first fall frost is October 7, with about a 10% chance of frost before September 24.
How long is the growing season in Sedgwick, CO?
About 154 days between the median last spring frost and first fall frost.
What planting zone is Sedgwick, CO?
Sedgwick, CO is in USDA hardiness zone 5b.