Greenfield, OK frost dates
Last spring frostApr 6median date
First fall frostNov 5median date
Growing season213 daysfrost-free
Hardiness zone7bZone 7b
How Greenfield compares
- In 8 years out of 10, the last spring frost in Greenfield falls between March 21 and April 23, a 33-day window. The first fall frost falls between October 21 and November 20.
- The median last frost is 2 days later 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 typical for zone 7b, where the median is Apr 5.
- The weather station records an average of 73 nights a year at or below 32°F.
- Compared with Edmond, OK, 82 km away, the last frost here is 4 days later than there and the growing season is 4 days shorter.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 21 |
| 50% (median) | April 6 |
| 10% (safe for tender plants) | April 23 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 21 |
| 50% (median) | November 5 |
| 90% (late) | November 20 |
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 Greenfield, OK
Greenfield, OK frost dates — last frost Apr 6, first frost Nov 5, zone 7b. whenisthelastfrost.com
Crop
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Start indoors: Jan 12 to Jan 26Transplant outside: Mar 9 to Mar 23
Start indoors: Jan 26 to Feb 9Transplant outside: Apr 20 to May 4
Start indoors: Jan 26 to Feb 9Transplant outside: Apr 20 to May 4
Start indoors: Feb 9 to Feb 23Transplant outside: Apr 13 to Apr 27
Start indoors: Feb 9 to Feb 23Transplant outside: Mar 16 to Mar 30Sow outdoors: Mar 9 to Apr 13Plant for fall: Sep 10 to Oct 8
Start indoors: Feb 9 to Feb 23Transplant outside: Mar 9 to Mar 23Sow outdoors: Mar 9 to Mar 23Plant for fall: Aug 27 to Sep 17
Start indoors: Feb 9 to Feb 23Transplant outside: Mar 23 to Apr 6Plant for fall: Jul 30 to Aug 20
Start indoors: Feb 9 to Feb 23Transplant outside: Mar 16 to Mar 30Plant for fall: Jul 30 to Aug 20
Start indoors: Feb 9 to Feb 23Transplant outside: Mar 23 to Apr 6Plant for fall: Jul 30 to Aug 20
Start indoors: Feb 23 to Mar 9Transplant outside: Apr 27 to May 11Sow outdoors: Apr 27 to May 11
Start indoors: Feb 23 to Mar 9Transplant outside: Apr 13 to Apr 27
Sow outdoors: Feb 23 to Mar 16Plant for fall: Aug 13 to Sep 3
Sow outdoors: Feb 23 to Mar 16Plant for fall: Sep 10 to Oct 1
Sow outdoors: Mar 2 to Apr 13Plant for fall: Sep 24 to Oct 15
Start indoors: Mar 9 to Mar 16Transplant outside: Apr 20 to Apr 27Sow outdoors: Apr 13 to Apr 27Plant for fall: Aug 20 to Sep 3
Start indoors: Mar 9 to Mar 16Sow outdoors: Apr 13 to Apr 27Plant for fall: Aug 27 to Sep 10
Start indoors: Mar 9 to Mar 16Sow outdoors: Apr 13 to Apr 27
Start indoors: Mar 9 to Mar 16Transplant outside: Apr 20 to May 4
Sow outdoors: Mar 16 to Apr 13Plant for fall: Aug 13 to Aug 27
Sow outdoors: Mar 16 to Apr 13Plant for fall: Aug 27 to Sep 10
Sow outdoors: Mar 16 to Apr 6
Sow outdoors: Mar 23 to Apr 20Plant for fall: Aug 27 to Sep 10
Sow outdoors: Mar 23 to Apr 13Plant for fall: Sep 10 to Oct 1
Sow outdoors: Apr 13 to May 4Plant for fall: Aug 20 to Sep 3
Sow outdoors: Apr 13 to Apr 27
Transplant outside: Apr 20 to May 11
Plant for fall: Oct 22 to Nov 26
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Greenfield, OK
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 12 – Jan 26 | Mar 9 – Mar 23 | — | — |
| Peppers | Jan 26 – Feb 9 | Apr 20 – May 4 | — | — |
| Eggplant | Jan 26 – Feb 9 | Apr 20 – May 4 | — | — |
| Tomatoes | Feb 9 – Feb 23 | Apr 13 – Apr 27 | — | — |
| Lettuce | Feb 9 – Feb 23 | Mar 16 – Mar 30 | Mar 9 – Apr 13 | Sep 10 – Oct 8 |
| Kale | Feb 9 – Feb 23 | Mar 9 – Mar 23 | Mar 9 – Mar 23 | Aug 27 – Sep 17 |
| Broccoli | Feb 9 – Feb 23 | Mar 23 – Apr 6 | — | Jul 30 – Aug 20 |
| Cabbage | Feb 9 – Feb 23 | Mar 16 – Mar 30 | — | Jul 30 – Aug 20 |
| Cauliflower | Feb 9 – Feb 23 | Mar 23 – Apr 6 | — | Jul 30 – Aug 20 |
| Okra | Feb 23 – Mar 9 | Apr 27 – May 11 | Apr 27 – May 11 | — |
| Basil | Feb 23 – Mar 9 | Apr 13 – Apr 27 | — | — |
| Peas | — | — | Feb 23 – Mar 16 | Aug 13 – Sep 3 |
| Spinach | — | — | Feb 23 – Mar 16 | Sep 10 – Oct 1 |
| Radishes | — | — | Mar 2 – Apr 13 | Sep 24 – Oct 15 |
| Cucumbers | Mar 9 – Mar 16 | Apr 20 – Apr 27 | Apr 13 – Apr 27 | Aug 20 – Sep 3 |
| Zucchini & Summer Squash | Mar 9 – Mar 16 | — | Apr 13 – Apr 27 | Aug 27 – Sep 10 |
| Winter Squash & Pumpkins | Mar 9 – Mar 16 | — | Apr 13 – Apr 27 | — |
| Melons & Watermelon | Mar 9 – Mar 16 | Apr 20 – May 4 | — | — |
| Carrots | — | — | Mar 16 – Apr 13 | Aug 13 – Aug 27 |
| Beets | — | — | Mar 16 – Apr 13 | Aug 27 – Sep 10 |
| Potatoes | — | — | Mar 16 – Apr 6 | — |
| Swiss Chard | — | — | Mar 23 – Apr 20 | Aug 27 – Sep 10 |
| Cilantro | — | — | Mar 23 – Apr 13 | Sep 10 – Oct 1 |
| Green Beans | — | — | Apr 13 – May 4 | Aug 20 – Sep 3 |
| Sweet Corn | — | — | Apr 13 – Apr 27 | — |
| Sweet Potatoes | — | Apr 20 – May 11 | — | — |
| Garlic | — | — | — | Oct 22 – Nov 26 |
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 Geary, OK weather station, 13 km away (elevation 1,572 ft (479 m)).
Frost dates near Greenfield
- Geary Apr 6 · Nov 5
- Watonga Apr 14 · Oct 27
- Omega Apr 14 · Oct 27
- Fay Apr 6 · Nov 3
- Hitchcock Apr 14 · Oct 27
- Calumet Apr 12 · Oct 27
- Hinton Apr 5 · Nov 1
- Thomas Apr 6 · Nov 3
- Hydro Apr 5 · Nov 1
- Loyal Apr 9 · Nov 1
Frequently asked questions
When is the last frost in Greenfield, OK?
The median last spring frost in Greenfield, OK is April 6. There is still about a 10% chance of frost after April 23, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Greenfield, OK?
The median first fall frost is November 5, with about a 10% chance of frost before October 21.
How long is the growing season in Greenfield, OK?
About 213 days between the median last spring frost and first fall frost.
What planting zone is Greenfield, OK?
Greenfield, OK is in USDA hardiness zone 7b.