Conception, MO frost dates
Last spring frostApr 17median date
First fall frostOct 20median date
Growing season186 daysfrost-free
Hardiness zone6aZone 6a
How Conception compares
- In 8 years out of 10, the last spring frost in Conception falls between April 3 and April 30, a 27-day window. The first fall frost falls between October 3 and November 2.
- The median last frost is 5 days later than the Missouri median of Apr 12.
- Its 186-day growing season is longer than 20% of the 938 Missouri places with a regular frost season (state median 195 days).
- The last frost is 12 days earlier than the zone 6a median of Apr 29. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 6a chart.
- The weather station records an average of 128 nights a year at or below 32°F.
- Compared with Saint Joseph, MO, 56 km away, the last frost here is 2 days earlier than there and the growing season is 5 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | April 3 |
| 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 Conception, MO
Conception, MO frost dates — last frost Apr 17, first frost Oct 20, zone 6a. 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 Conception, MO
| 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 Conception, MO weather station, about 1 km away (elevation 1,109 ft (338 m)).
Frost dates near Conception
- Conception Junction Apr 17 · Oct 20
- Clyde Apr 17 · Oct 20
- Guilford Apr 17 · Oct 20
- Barnard Apr 17 · Oct 20
- Stanberry Apr 17 · Oct 20
- Ravenwood Apr 19 · Oct 17
- Maryville Apr 19 · Oct 17
- Rea Apr 17 · Oct 20
- Parnell Apr 20 · Oct 19
- Bolckow Apr 17 · Oct 20
Frequently asked questions
When is the last frost in Conception, MO?
The median last spring frost in Conception, MO 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 Conception, MO?
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 Conception, MO?
About 186 days between the median last spring frost and first fall frost.
What planting zone is Conception, MO?
Conception, MO is in USDA hardiness zone 6a.