Green Castle, MO frost dates
Last spring frostApr 26median date
First fall frostOct 14median date
Growing season171 daysfrost-free
Hardiness zone6aZone 6a
How Green Castle compares
- In 8 years out of 10, the last spring frost in Green Castle falls between April 11 and May 12, a 31-day window. The first fall frost falls between September 30 and October 27.
- The median last frost is 14 days later than the Missouri median of Apr 12.
- Its 171-day growing season is among the shortest of the 938 Missouri places with a regular frost season.
- The last frost is typical for zone 6a, where the median is Apr 29.
- The weather station records an average of 139 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 11 |
| 50% (median) | April 26 |
| 10% (safe for tender plants) | May 12 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | September 30 |
| 50% (median) | October 14 |
| 90% (late) | October 27 |
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 Green Castle, MO
Green Castle, MO frost dates — last frost Apr 26, first frost Oct 14, zone 6a. whenisthelastfrost.com
Crop
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Start indoors: Feb 1 to Feb 15Transplant outside: Mar 29 to Apr 12
Start indoors: Feb 15 to Mar 1Transplant outside: May 10 to May 24
Start indoors: Feb 15 to Mar 1Transplant outside: May 10 to May 24
Start indoors: Mar 1 to Mar 15Transplant outside: May 3 to May 17
Start indoors: Mar 1 to Mar 15Transplant outside: Apr 5 to Apr 19Sow outdoors: Mar 29 to May 3Plant for fall: Aug 19 to Sep 16
Start indoors: Mar 1 to Mar 15Transplant outside: Mar 29 to Apr 12Sow outdoors: Mar 29 to Apr 12Plant for fall: Aug 5 to Aug 26
Start indoors: Mar 1 to Mar 15Transplant outside: Apr 12 to Apr 26Plant for fall: Jul 8 to Jul 29
Start indoors: Mar 1 to Mar 15Transplant outside: Apr 5 to Apr 19Plant for fall: Jul 8 to Jul 29
Start indoors: Mar 1 to Mar 15Transplant outside: Apr 12 to Apr 26Plant for fall: Jul 8 to Jul 29
Start indoors: Mar 15 to Mar 29Transplant outside: May 17 to May 31Sow outdoors: May 17 to May 31
Start indoors: Mar 15 to Mar 29Transplant outside: May 3 to May 17
Sow outdoors: Mar 15 to Apr 5Plant for fall: Jul 22 to Aug 12
Sow outdoors: Mar 15 to Apr 5Plant for fall: Aug 19 to Sep 9
Sow outdoors: Mar 22 to May 3Plant for fall: Sep 2 to Sep 23
Start indoors: Mar 29 to Apr 5Transplant outside: May 10 to May 17Sow outdoors: May 3 to May 17Plant for fall: Jul 29 to Aug 12
Start indoors: Mar 29 to Apr 5Sow outdoors: May 3 to May 17Plant for fall: Aug 5 to Aug 19
Start indoors: Mar 29 to Apr 5Sow outdoors: May 3 to May 17
Start indoors: Mar 29 to Apr 5Transplant outside: May 10 to May 24
Sow outdoors: Apr 5 to May 3Plant for fall: Jul 22 to Aug 5
Sow outdoors: Apr 5 to May 3Plant for fall: Aug 5 to Aug 19
Sow outdoors: Apr 5 to Apr 26
Sow outdoors: Apr 12 to May 10Plant for fall: Aug 5 to Aug 19
Sow outdoors: Apr 12 to May 3Plant for fall: Aug 19 to Sep 9
Sow outdoors: May 3 to May 24Plant for fall: Jul 29 to Aug 12
Sow outdoors: May 3 to May 17
Transplant outside: May 10 to May 31
Plant for fall: Sep 30 to Nov 4
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Green Castle, MO
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Feb 1 – Feb 15 | Mar 29 – Apr 12 | — | — |
| Peppers | Feb 15 – Mar 1 | May 10 – May 24 | — | — |
| Eggplant | Feb 15 – Mar 1 | May 10 – May 24 | — | — |
| Tomatoes | Mar 1 – Mar 15 | May 3 – May 17 | — | — |
| Lettuce | Mar 1 – Mar 15 | Apr 5 – Apr 19 | Mar 29 – May 3 | Aug 19 – Sep 16 |
| Kale | Mar 1 – Mar 15 | Mar 29 – Apr 12 | Mar 29 – Apr 12 | Aug 5 – Aug 26 |
| Broccoli | Mar 1 – Mar 15 | Apr 12 – Apr 26 | — | Jul 8 – Jul 29 |
| Cabbage | Mar 1 – Mar 15 | Apr 5 – Apr 19 | — | Jul 8 – Jul 29 |
| Cauliflower | Mar 1 – Mar 15 | Apr 12 – Apr 26 | — | Jul 8 – Jul 29 |
| Okra | Mar 15 – Mar 29 | May 17 – May 31 | May 17 – May 31 | — |
| Basil | Mar 15 – Mar 29 | May 3 – May 17 | — | — |
| Peas | — | — | Mar 15 – Apr 5 | Jul 22 – Aug 12 |
| Spinach | — | — | Mar 15 – Apr 5 | Aug 19 – Sep 9 |
| Radishes | — | — | Mar 22 – May 3 | Sep 2 – Sep 23 |
| Cucumbers | Mar 29 – Apr 5 | May 10 – May 17 | May 3 – May 17 | Jul 29 – Aug 12 |
| Zucchini & Summer Squash | Mar 29 – Apr 5 | — | May 3 – May 17 | Aug 5 – Aug 19 |
| Winter Squash & Pumpkins | Mar 29 – Apr 5 | — | May 3 – May 17 | — |
| Melons & Watermelon | Mar 29 – Apr 5 | May 10 – May 24 | — | — |
| Carrots | — | — | Apr 5 – May 3 | Jul 22 – Aug 5 |
| Beets | — | — | Apr 5 – May 3 | Aug 5 – Aug 19 |
| Potatoes | — | — | Apr 5 – Apr 26 | — |
| Swiss Chard | — | — | Apr 12 – May 10 | Aug 5 – Aug 19 |
| Cilantro | — | — | Apr 12 – May 3 | Aug 19 – Sep 9 |
| Green Beans | — | — | May 3 – May 24 | Jul 29 – Aug 12 |
| Sweet Corn | — | — | May 3 – May 17 | — |
| Sweet Potatoes | — | May 10 – May 31 | — | — |
| Garlic | — | — | — | Sep 30 – Nov 4 |
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 Green City 5n, MO weather station, 11 km away (elevation 1,037 ft (316 m)).
Frost dates near Green Castle
- Green City Apr 26 · Oct 14
- Novinger Apr 21 · Oct 19
- Pollock Apr 26 · Oct 14
- Worthington Apr 26 · Oct 14
- Milan Apr 26 · Oct 14
- Unionville Apr 17 · Oct 22
- Winigan Apr 15 · Oct 20
- Kirksville Apr 21 · Oct 19
- Greentop Apr 21 · Oct 19
- Livonia Apr 17 · Oct 22
Frequently asked questions
When is the last frost in Green Castle, MO?
The median last spring frost in Green Castle, MO is April 26. There is still about a 10% chance of frost after May 12, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Green Castle, MO?
The median first fall frost is October 14, with about a 10% chance of frost before September 30.
How long is the growing season in Green Castle, MO?
About 171 days between the median last spring frost and first fall frost.
What planting zone is Green Castle, MO?
Green Castle, MO is in USDA hardiness zone 6a.