When to plant Summer squash (zucchini) in Oklahoma
In spring, from Mar 15 – May 1 in Ardmore to May 1 – June 15 in Guymon.
In fall, June 1 – Aug 1.
USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring | Fall |
|---|---|---|
| Ada | Apr 10 – June 1 | June 1 – Aug 1 |
| Altus | Apr 20 – June 1 | June 1 – Aug 1 |
| Ardmore | Mar 15 – May 1 | June 1 – Aug 10 |
| Bartlesville | Apr 20 – June 1 | June 1 – July 20 |
| Bethany | Apr 10 – June 1 | June 1 – Aug 1 |
| Bixby | Apr 10 – June 1 | June 1 – Aug 1 |
| Broken Arrow | Apr 10 – June 1 | June 1 – Aug 1 |
| Chickasha | Apr 10 – June 1 | June 1 – Aug 1 |
| Choctaw | Apr 10 – June 1 | June 1 – Aug 10 |
| Claremore | Apr 20 – June 1 | June 1 – Aug 1 |
| Coweta | Apr 10 – June 1 | June 1 – Aug 1 |
| Del City | Apr 10 – June 1 | June 1 – Aug 10 |
| Duncan | Apr 1 – May 15 | June 1 – Aug 10 |
| Durant | Apr 10 – June 1 | June 1 – Aug 10 |
| Edmond | Apr 20 – June 1 | June 1 – Aug 1 |
| El Reno | Apr 20 – June 1 | June 1 – Aug 1 |
| Elk City | Apr 20 – June 1 | June 1 – Aug 1 |
| Enid | Apr 20 – June 1 | June 1 – Aug 1 |
| Glenpool | Apr 10 – June 1 | June 1 – Aug 1 |
| Guthrie | Apr 10 – June 1 | June 1 – Aug 1 |
| Guymon | May 1 – June 15 | June 1 – July 20 |
| Jenks | Apr 10 – June 1 | June 1 – Aug 1 |
| Lawton | Apr 10 – June 1 | June 1 – Aug 10 |
| McAlester | Apr 10 – June 1 | June 1 – Aug 1 |
| Miami | Apr 20 – June 1 | June 1 – Aug 1 |
| Midwest City | Apr 10 – June 1 | June 1 – Aug 10 |
| Moore | Apr 10 – June 1 | June 1 – Aug 10 |
| Muskogee | Apr 20 – June 1 | June 1 – Aug 1 |
| Mustang | Apr 10 – June 1 | June 1 – Aug 1 |
| Newcastle | Apr 10 – June 1 | June 1 – Aug 10 |
| Norman | Apr 10 – June 1 | June 1 – Aug 1 |
| Oklahoma City | Apr 10 – June 1 | June 1 – Aug 1 |
| Okmulgee | Apr 20 – June 1 | June 1 – Aug 1 |
| Owasso | Apr 10 – June 1 | June 1 – Aug 1 |
| Ponca City | Apr 20 – June 1 | June 1 – Aug 1 |
| Sand Springs | Apr 10 – June 1 | June 1 – Aug 1 |
| Sapulpa | Apr 10 – June 1 | June 1 – Aug 1 |
| Shawnee | Apr 10 – June 1 | June 1 – Aug 10 |
| Stillwater | Apr 20 – June 1 | June 1 – Aug 1 |
| Tahlequah | Apr 10 – June 1 | June 1 – Aug 1 |
| Tulsa | Apr 10 – June 1 | June 1 – Aug 1 |
| Warr Acres | Apr 10 – June 1 | June 1 – Aug 1 |
| Weatherford | Apr 10 – June 1 | June 1 – Aug 1 |
| Woodward | Apr 20 – June 1 | June 1 – Aug 1 |
| Yukon | Apr 10 – June 1 | June 1 – Aug 1 |
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), tables 4 and 5. Frost dates: NOAA U.S. Climate Normals 1991–2020. The full USDA table for summer squash.