Chapman, KS frost dates
Last spring frostApr 17median date
First fall frostOct 20median date
Growing season186 daysfrost-free
Hardiness zone6bZone 6b
How Chapman compares
- In 8 years out of 10, the last spring frost in Chapman falls between April 2 and April 30, a 28-day window. The first fall frost falls between October 3 and November 2.
- The median last frost is 1 day earlier than the Kansas median of Apr 18.
- Its 186-day growing season is longer than 47% of the 632 Kansas places with a regular frost season (state median 187 days).
- The last frost is 5 days earlier than the zone 6b median of Apr 22. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 6b chart.
- The weather station records an average of 132 nights a year at or below 32°F.
- Compared with Manhattan, KS, 45 km away, the last frost here is 5 days earlier than there and the growing season is 5 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 2 |
| 50% (median) | April 17 |
| 10% (safe for tender plants) | April 30 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 3 |
| 50% (median) | October 20 |
| 90% (late) | November 2 |
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 Chapman, KS
Chapman, KS frost dates — last frost Apr 17, first frost Oct 20, zone 6b. whenisthelastfrost.com
Crop
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Start indoors: Jan 23 to Feb 6Transplant outside: Mar 20 to Apr 3
Start indoors: Feb 6 to Feb 20Transplant outside: May 1 to May 15
Start indoors: Feb 6 to Feb 20Transplant outside: May 1 to May 15
Start indoors: Feb 20 to Mar 6Transplant outside: Apr 24 to May 8
Start indoors: Feb 20 to Mar 6Transplant outside: Mar 27 to Apr 10Sow outdoors: Mar 20 to Apr 24Plant for fall: Aug 25 to Sep 22
Start indoors: Feb 20 to Mar 6Transplant outside: Mar 20 to Apr 3Sow outdoors: Mar 20 to Apr 3Plant for fall: Aug 11 to Sep 1
Start indoors: Feb 20 to Mar 6Transplant outside: Apr 3 to Apr 17Plant for fall: Jul 14 to Aug 4
Start indoors: Feb 20 to Mar 6Transplant outside: Mar 27 to Apr 10Plant for fall: Jul 14 to Aug 4
Start indoors: Feb 20 to Mar 6Transplant outside: Apr 3 to Apr 17Plant for fall: Jul 14 to Aug 4
Start indoors: Mar 6 to Mar 20Transplant outside: May 8 to May 22Sow outdoors: May 8 to May 22
Start indoors: Mar 6 to Mar 20Transplant outside: Apr 24 to May 8
Sow outdoors: Mar 6 to Mar 27Plant for fall: Jul 28 to Aug 18
Sow outdoors: Mar 6 to Mar 27Plant for fall: Aug 25 to Sep 15
Sow outdoors: Mar 13 to Apr 24Plant for fall: Sep 8 to Sep 29
Start indoors: Mar 20 to Mar 27Transplant outside: May 1 to May 8Sow outdoors: Apr 24 to May 8Plant for fall: Aug 4 to Aug 18
Start indoors: Mar 20 to Mar 27Sow outdoors: Apr 24 to May 8Plant for fall: Aug 11 to Aug 25
Start indoors: Mar 20 to Mar 27Sow outdoors: Apr 24 to May 8
Start indoors: Mar 20 to Mar 27Transplant outside: May 1 to May 15
Sow outdoors: Mar 27 to Apr 24Plant for fall: Jul 28 to Aug 11
Sow outdoors: Mar 27 to Apr 24Plant for fall: Aug 11 to Aug 25
Sow outdoors: Mar 27 to Apr 17
Sow outdoors: Apr 3 to May 1Plant for fall: Aug 11 to Aug 25
Sow outdoors: Apr 3 to Apr 24Plant for fall: Aug 25 to Sep 15
Sow outdoors: Apr 24 to May 15Plant for fall: Aug 4 to Aug 18
Sow outdoors: Apr 24 to May 8
Transplant outside: May 1 to May 22
Plant for fall: Oct 6 to Nov 10
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Chapman, KS
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 23 – Feb 6 | Mar 20 – Apr 3 | — | — |
| Peppers | Feb 6 – Feb 20 | May 1 – May 15 | — | — |
| Eggplant | Feb 6 – Feb 20 | May 1 – May 15 | — | — |
| Tomatoes | Feb 20 – Mar 6 | Apr 24 – May 8 | — | — |
| Lettuce | Feb 20 – Mar 6 | Mar 27 – Apr 10 | Mar 20 – Apr 24 | Aug 25 – Sep 22 |
| Kale | Feb 20 – Mar 6 | Mar 20 – Apr 3 | Mar 20 – Apr 3 | Aug 11 – Sep 1 |
| Broccoli | Feb 20 – Mar 6 | Apr 3 – Apr 17 | — | Jul 14 – Aug 4 |
| Cabbage | Feb 20 – Mar 6 | Mar 27 – Apr 10 | — | Jul 14 – Aug 4 |
| Cauliflower | Feb 20 – Mar 6 | Apr 3 – Apr 17 | — | Jul 14 – Aug 4 |
| Okra | Mar 6 – Mar 20 | May 8 – May 22 | May 8 – May 22 | — |
| Basil | Mar 6 – Mar 20 | Apr 24 – May 8 | — | — |
| Peas | — | — | Mar 6 – Mar 27 | Jul 28 – Aug 18 |
| Spinach | — | — | Mar 6 – Mar 27 | Aug 25 – Sep 15 |
| Radishes | — | — | Mar 13 – Apr 24 | Sep 8 – Sep 29 |
| Cucumbers | Mar 20 – Mar 27 | May 1 – May 8 | Apr 24 – May 8 | Aug 4 – Aug 18 |
| Zucchini & Summer Squash | Mar 20 – Mar 27 | — | Apr 24 – May 8 | Aug 11 – Aug 25 |
| Winter Squash & Pumpkins | Mar 20 – Mar 27 | — | Apr 24 – May 8 | — |
| Melons & Watermelon | Mar 20 – Mar 27 | May 1 – May 15 | — | — |
| Carrots | — | — | Mar 27 – Apr 24 | Jul 28 – Aug 11 |
| Beets | — | — | Mar 27 – Apr 24 | Aug 11 – Aug 25 |
| Potatoes | — | — | Mar 27 – Apr 17 | — |
| Swiss Chard | — | — | Apr 3 – May 1 | Aug 11 – Aug 25 |
| Cilantro | — | — | Apr 3 – Apr 24 | Aug 25 – Sep 15 |
| Green Beans | — | — | Apr 24 – May 15 | Aug 4 – Aug 18 |
| Sweet Corn | — | — | Apr 24 – May 8 | — |
| Sweet Potatoes | — | May 1 – May 22 | — | — |
| Garlic | — | — | — | Oct 6 – Nov 10 |
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 Chapman, KS weather station, about 1 km away (elevation 1,112 ft (339 m)).
Frost dates near Chapman
- Enterprise Apr 14 · Oct 23
- Junction City Apr 12 · Oct 26
- Abilene Apr 14 · Oct 23
- Woodbine Apr 24 · Oct 14
- Talmage Apr 14 · Oct 23
- Fort Riley Apr 12 · Oct 26
- Milford Apr 12 · Oct 26
- Wakefield Apr 19 · Oct 19
- Solomon Apr 14 · Oct 23
- White City Apr 24 · Oct 14
Frequently asked questions
When is the last frost in Chapman, KS?
The median last spring frost in Chapman, KS is April 17. There is still about a 10% chance of frost after April 30, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Chapman, KS?
The median first fall frost is October 20, with about a 10% chance of frost before October 3.
How long is the growing season in Chapman, KS?
About 186 days between the median last spring frost and first fall frost.
What planting zone is Chapman, KS?
Chapman, KS is in USDA hardiness zone 6b.