Boswell, OK frost dates
Last spring frostApr 2median date
First fall frostNov 1median date
Growing season213 daysfrost-free
Hardiness zone8aZone 8a
How Boswell compares
- In 8 years out of 10, the last spring frost in Boswell falls between March 14 and April 20, a 37-day window. The first fall frost falls between October 17 and November 17.
- The median last frost is 2 days earlier than the Oklahoma median of Apr 4.
- Its 213-day growing season is longer than 56% of the 582 Oklahoma places with a regular frost season (state median 211 days).
- The last frost is 4 days later than the zone 8a median of Mar 29. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 8a chart.
- The weather station records an average of 78 nights a year at or below 32°F.
- Compared with Mckinney, TX, 117 km away, the last frost here is 16 days later than there and the growing season is 30 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 14 |
| 50% (median) | April 2 |
| 10% (safe for tender plants) | April 20 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 17 |
| 50% (median) | November 1 |
| 90% (late) | November 17 |
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 Boswell, OK
Boswell, OK frost dates — last frost Apr 2, first frost Nov 1, zone 8a. whenisthelastfrost.com
Crop
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Start indoors: Jan 8 to Jan 22Transplant outside: Mar 5 to Mar 19
Start indoors: Jan 22 to Feb 5Transplant outside: Apr 16 to Apr 30
Start indoors: Jan 22 to Feb 5Transplant outside: Apr 16 to Apr 30
Start indoors: Feb 5 to Feb 19Transplant outside: Apr 9 to Apr 23
Start indoors: Feb 5 to Feb 19Transplant outside: Mar 12 to Mar 26Sow outdoors: Mar 5 to Apr 9Plant for fall: Sep 6 to Oct 4
Start indoors: Feb 5 to Feb 19Transplant outside: Mar 5 to Mar 19Sow outdoors: Mar 5 to Mar 19Plant for fall: Aug 23 to Sep 13
Start indoors: Feb 5 to Feb 19Transplant outside: Mar 19 to Apr 2Plant for fall: Jul 26 to Aug 16
Start indoors: Feb 5 to Feb 19Transplant outside: Mar 12 to Mar 26Plant for fall: Jul 26 to Aug 16
Start indoors: Feb 5 to Feb 19Transplant outside: Mar 19 to Apr 2Plant for fall: Jul 26 to Aug 16
Start indoors: Feb 19 to Mar 5Transplant outside: Apr 23 to May 7Sow outdoors: Apr 23 to May 7
Start indoors: Feb 19 to Mar 5Transplant outside: Apr 9 to Apr 23
Sow outdoors: Feb 19 to Mar 12Plant for fall: Aug 9 to Aug 30
Sow outdoors: Feb 19 to Mar 12Plant for fall: Sep 6 to Sep 27
Sow outdoors: Feb 26 to Apr 9Plant for fall: Sep 20 to Oct 11
Start indoors: Mar 5 to Mar 12Transplant outside: Apr 16 to Apr 23Sow outdoors: Apr 9 to Apr 23Plant for fall: Aug 16 to Aug 30
Start indoors: Mar 5 to Mar 12Sow outdoors: Apr 9 to Apr 23Plant for fall: Aug 23 to Sep 6
Start indoors: Mar 5 to Mar 12Sow outdoors: Apr 9 to Apr 23
Start indoors: Mar 5 to Mar 12Transplant outside: Apr 16 to Apr 30
Sow outdoors: Mar 12 to Apr 9Plant for fall: Aug 9 to Aug 23
Sow outdoors: Mar 12 to Apr 9Plant for fall: Aug 23 to Sep 6
Sow outdoors: Mar 12 to Apr 2
Sow outdoors: Mar 19 to Apr 16Plant for fall: Aug 23 to Sep 6
Sow outdoors: Mar 19 to Apr 9Plant for fall: Sep 6 to Sep 27
Sow outdoors: Apr 9 to Apr 30Plant for fall: Aug 16 to Aug 30
Sow outdoors: Apr 9 to Apr 23
Transplant outside: Apr 16 to May 7
Plant for fall: Oct 18 to Nov 22
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Boswell, OK
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 8 – Jan 22 | Mar 5 – Mar 19 | — | — |
| Peppers | Jan 22 – Feb 5 | Apr 16 – Apr 30 | — | — |
| Eggplant | Jan 22 – Feb 5 | Apr 16 – Apr 30 | — | — |
| Tomatoes | Feb 5 – Feb 19 | Apr 9 – Apr 23 | — | — |
| Lettuce | Feb 5 – Feb 19 | Mar 12 – Mar 26 | Mar 5 – Apr 9 | Sep 6 – Oct 4 |
| Kale | Feb 5 – Feb 19 | Mar 5 – Mar 19 | Mar 5 – Mar 19 | Aug 23 – Sep 13 |
| Broccoli | Feb 5 – Feb 19 | Mar 19 – Apr 2 | — | Jul 26 – Aug 16 |
| Cabbage | Feb 5 – Feb 19 | Mar 12 – Mar 26 | — | Jul 26 – Aug 16 |
| Cauliflower | Feb 5 – Feb 19 | Mar 19 – Apr 2 | — | Jul 26 – Aug 16 |
| Okra | Feb 19 – Mar 5 | Apr 23 – May 7 | Apr 23 – May 7 | — |
| Basil | Feb 19 – Mar 5 | Apr 9 – Apr 23 | — | — |
| Peas | — | — | Feb 19 – Mar 12 | Aug 9 – Aug 30 |
| Spinach | — | — | Feb 19 – Mar 12 | Sep 6 – Sep 27 |
| Radishes | — | — | Feb 26 – Apr 9 | Sep 20 – Oct 11 |
| Cucumbers | Mar 5 – Mar 12 | Apr 16 – Apr 23 | Apr 9 – Apr 23 | Aug 16 – Aug 30 |
| Zucchini & Summer Squash | Mar 5 – Mar 12 | — | Apr 9 – Apr 23 | Aug 23 – Sep 6 |
| Winter Squash & Pumpkins | Mar 5 – Mar 12 | — | Apr 9 – Apr 23 | — |
| Melons & Watermelon | Mar 5 – Mar 12 | Apr 16 – Apr 30 | — | — |
| Carrots | — | — | Mar 12 – Apr 9 | Aug 9 – Aug 23 |
| Beets | — | — | Mar 12 – Apr 9 | Aug 23 – Sep 6 |
| Potatoes | — | — | Mar 12 – Apr 2 | — |
| Swiss Chard | — | — | Mar 19 – Apr 16 | Aug 23 – Sep 6 |
| Cilantro | — | — | Mar 19 – Apr 9 | Sep 6 – Sep 27 |
| Green Beans | — | — | Apr 9 – Apr 30 | Aug 16 – Aug 30 |
| Sweet Corn | — | — | Apr 9 – Apr 23 | — |
| Sweet Potatoes | — | Apr 16 – May 7 | — | — |
| Garlic | — | — | — | Oct 18 – Nov 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 Antlers 5nw, OK weather station, 26 km away (elevation 577 ft (176 m)).
Frost dates near Boswell
- Soper Mar 15 · Nov 15
- Bennington Mar 19 · Nov 12
- Lane Mar 29 · Nov 4
- Bokchito Mar 19 · Nov 12
- Hugo Mar 15 · Nov 15
- Antlers Apr 3 · Nov 1
- Albany Mar 19 · Nov 12
- Grant Mar 15 · Nov 15
- Moyers Apr 2 · Nov 1
- Caddo Mar 31 · Nov 5
Frequently asked questions
When is the last frost in Boswell, OK?
The median last spring frost in Boswell, OK is April 2. There is still about a 10% chance of frost after April 20, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Boswell, OK?
The median first fall frost is November 1, with about a 10% chance of frost before October 17.
How long is the growing season in Boswell, OK?
About 213 days between the median last spring frost and first fall frost.
What planting zone is Boswell, OK?
Boswell, OK is in USDA hardiness zone 8a.