Bristow, OK frost dates
Last spring frostApr 9median date
First fall frostOct 25median date
Growing season199 daysfrost-free
Hardiness zone7bZone 7b
How Bristow compares
- In 8 years out of 10, the last spring frost in Bristow falls between March 24 and April 27, a 34-day window. The first fall frost falls between October 10 and November 8.
- The median last frost is 5 days later than the Oklahoma median of Apr 4.
- Its 199-day growing season is longer than 12% of the 582 Oklahoma places with a regular frost season (state median 211 days).
- The last frost is 4 days later than the zone 7b median of Apr 5. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 7b chart.
- The weather station records an average of 78 nights a year at or below 32°F.
- Compared with Tulsa, OK, 51 km away, the last frost here is 9 days later than there and the growing season is 19 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 24 |
| 50% (median) | April 9 |
| 10% (safe for tender plants) | April 27 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 10 |
| 50% (median) | October 25 |
| 90% (late) | November 8 |
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 Bristow, OK
Bristow, OK frost dates — last frost Apr 9, first frost Oct 25, zone 7b. whenisthelastfrost.com
Crop
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Start indoors: Jan 15 to Jan 29Transplant outside: Mar 12 to Mar 26
Start indoors: Jan 29 to Feb 12Transplant outside: Apr 23 to May 7
Start indoors: Jan 29 to Feb 12Transplant outside: Apr 23 to May 7
Start indoors: Feb 12 to Feb 26Transplant outside: Apr 16 to Apr 30
Start indoors: Feb 12 to Feb 26Transplant outside: Mar 19 to Apr 2Sow outdoors: Mar 12 to Apr 16Plant for fall: Aug 30 to Sep 27
Start indoors: Feb 12 to Feb 26Transplant outside: Mar 12 to Mar 26Sow outdoors: Mar 12 to Mar 26Plant for fall: Aug 16 to Sep 6
Start indoors: Feb 12 to Feb 26Transplant outside: Mar 26 to Apr 9Plant for fall: Jul 19 to Aug 9
Start indoors: Feb 12 to Feb 26Transplant outside: Mar 19 to Apr 2Plant for fall: Jul 19 to Aug 9
Start indoors: Feb 12 to Feb 26Transplant outside: Mar 26 to Apr 9Plant for fall: Jul 19 to Aug 9
Start indoors: Feb 26 to Mar 12Transplant outside: Apr 30 to May 14Sow outdoors: Apr 30 to May 14
Start indoors: Feb 26 to Mar 12Transplant outside: Apr 16 to Apr 30
Sow outdoors: Feb 26 to Mar 19Plant for fall: Aug 2 to Aug 23
Sow outdoors: Feb 26 to Mar 19Plant for fall: Aug 30 to Sep 20
Sow outdoors: Mar 5 to Apr 16Plant for fall: Sep 13 to Oct 4
Start indoors: Mar 12 to Mar 19Transplant outside: Apr 23 to Apr 30Sow outdoors: Apr 16 to Apr 30Plant for fall: Aug 9 to Aug 23
Start indoors: Mar 12 to Mar 19Sow outdoors: Apr 16 to Apr 30Plant for fall: Aug 16 to Aug 30
Start indoors: Mar 12 to Mar 19Sow outdoors: Apr 16 to Apr 30
Start indoors: Mar 12 to Mar 19Transplant outside: Apr 23 to May 7
Sow outdoors: Mar 19 to Apr 16Plant for fall: Aug 2 to Aug 16
Sow outdoors: Mar 19 to Apr 16Plant for fall: Aug 16 to Aug 30
Sow outdoors: Mar 19 to Apr 9
Sow outdoors: Mar 26 to Apr 23Plant for fall: Aug 16 to Aug 30
Sow outdoors: Mar 26 to Apr 16Plant for fall: Aug 30 to Sep 20
Sow outdoors: Apr 16 to May 7Plant for fall: Aug 9 to Aug 23
Sow outdoors: Apr 16 to Apr 30
Transplant outside: Apr 23 to May 14
Plant for fall: Oct 11 to Nov 15
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Bristow, OK
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 15 – Jan 29 | Mar 12 – Mar 26 | — | — |
| Peppers | Jan 29 – Feb 12 | Apr 23 – May 7 | — | — |
| Eggplant | Jan 29 – Feb 12 | Apr 23 – May 7 | — | — |
| Tomatoes | Feb 12 – Feb 26 | Apr 16 – Apr 30 | — | — |
| Lettuce | Feb 12 – Feb 26 | Mar 19 – Apr 2 | Mar 12 – Apr 16 | Aug 30 – Sep 27 |
| Kale | Feb 12 – Feb 26 | Mar 12 – Mar 26 | Mar 12 – Mar 26 | Aug 16 – Sep 6 |
| Broccoli | Feb 12 – Feb 26 | Mar 26 – Apr 9 | — | Jul 19 – Aug 9 |
| Cabbage | Feb 12 – Feb 26 | Mar 19 – Apr 2 | — | Jul 19 – Aug 9 |
| Cauliflower | Feb 12 – Feb 26 | Mar 26 – Apr 9 | — | Jul 19 – Aug 9 |
| Okra | Feb 26 – Mar 12 | Apr 30 – May 14 | Apr 30 – May 14 | — |
| Basil | Feb 26 – Mar 12 | Apr 16 – Apr 30 | — | — |
| Peas | — | — | Feb 26 – Mar 19 | Aug 2 – Aug 23 |
| Spinach | — | — | Feb 26 – Mar 19 | Aug 30 – Sep 20 |
| Radishes | — | — | Mar 5 – Apr 16 | Sep 13 – Oct 4 |
| Cucumbers | Mar 12 – Mar 19 | Apr 23 – Apr 30 | Apr 16 – Apr 30 | Aug 9 – Aug 23 |
| Zucchini & Summer Squash | Mar 12 – Mar 19 | — | Apr 16 – Apr 30 | Aug 16 – Aug 30 |
| Winter Squash & Pumpkins | Mar 12 – Mar 19 | — | Apr 16 – Apr 30 | — |
| Melons & Watermelon | Mar 12 – Mar 19 | Apr 23 – May 7 | — | — |
| Carrots | — | — | Mar 19 – Apr 16 | Aug 2 – Aug 16 |
| Beets | — | — | Mar 19 – Apr 16 | Aug 16 – Aug 30 |
| Potatoes | — | — | Mar 19 – Apr 9 | — |
| Swiss Chard | — | — | Mar 26 – Apr 23 | Aug 16 – Aug 30 |
| Cilantro | — | — | Mar 26 – Apr 16 | Aug 30 – Sep 20 |
| Green Beans | — | — | Apr 16 – May 7 | Aug 9 – Aug 23 |
| Sweet Corn | — | — | Apr 16 – Apr 30 | — |
| Sweet Potatoes | — | Apr 23 – May 14 | — | — |
| Garlic | — | — | — | Oct 11 – Nov 15 |
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 Bristow, OK weather station, 2 km away (elevation 830 ft (253 m)).
Frost dates near Bristow
- Slick Apr 9 · Oct 25
- Depew Apr 9 · Oct 25
- Kellyville Apr 9 · Oct 25
- Milfay Apr 9 · Oct 25
- Shamrock Apr 9 · Oct 25
- Drumright Apr 6 · Oct 29
- Mounds Mar 30 · Nov 4
- Stroud Apr 2 · Nov 2
- Mannford Apr 6 · Oct 29
- Beggs Apr 8 · Oct 28
Frequently asked questions
When is the last frost in Bristow, OK?
The median last spring frost in Bristow, OK is April 9. There is still about a 10% chance of frost after April 27, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Bristow, OK?
The median first fall frost is October 25, with about a 10% chance of frost before October 10.
How long is the growing season in Bristow, OK?
About 199 days between the median last spring frost and first fall frost.
What planting zone is Bristow, OK?
Bristow, OK is in USDA hardiness zone 7b.