Calendars by city / OK
Oklahoma City, Oklahoma vegetable planting calendar
Planting windows for Oklahoma City, Oklahoma built from the NOAA 1991–2020 freeze normals at OKLAHOMA CITY WILL ROGERS WORLD AIRPORT, OK US (station USW00013967), not from a hardiness zone.
Oklahoma City, Oklahoma planting dates for 27 vegetables
The same windows as a table
Each row applies a published extension rule to the frost dates above. Hardy crops go out 2–4 weeks before the last frost; semi-hardy crops 0–2 weeks before; tender crops around the frost date; very tender crops 2 or more weeks after. The last fall planting date counts the crop's days to harvest back from the first fall frost. The rules and their sources are on the methodology page.
| Crop | Frost class | Start seeds indoors | Plant outdoors | Last fall planting | Days to harvest |
|---|---|---|---|---|---|
| Beets | Semi-hardy | — (direct sow) | Direct sow: Mar 13 – Mar 27 | Sep 17 | 60 |
| Broccoli | Hardy | Jan 9 – Feb 6 | Transplant: Feb 27 – Mar 13 | Sep 19 | 65 (from transplant) |
| Cabbage | Hardy | Jan 9 – Feb 6 | Transplant: Feb 27 – Mar 13 | Aug 30 | 85 (from transplant) |
| Carrots | Semi-hardy | — (direct sow) | Direct sow: Mar 13 – Mar 27 | Sep 7 | 70 |
| Cauliflower | Semi-hardy | Jan 23 – Feb 20 | Transplant: Mar 13 – Mar 27 | Sep 12 | 65 (from transplant) |
| Kohlrabi | Hardy | — (direct sow) | Direct sow: Feb 27 – Mar 13 | Oct 4 | 50 |
| Lettuce (leaf) | Hardy | — (direct sow) | Direct sow: Feb 27 – Mar 13 | Sep 24 | 60 |
| Onions (green) | Hardy | — (direct sow) | Direct sow: Feb 27 – Mar 13 | Sep 24 | 60 |
| Onions (dry, from seed) | Hardy | — (direct sow) | Direct sow: Feb 27 – Mar 13 | Aug 5 | 110 |
| Onions (dry, from sets) | Hardy | — (direct sow) | Plant sets: Feb 27 – Mar 13 | Aug 5 | 110 |
| Parsnips | Semi-hardy | — (direct sow) | Direct sow: Mar 13 – Mar 27 | Sep 7 | 70 |
| Peas | Hardy | — (direct sow) | Direct sow: Feb 27 – Mar 13 | Sep 19 | 65 |
| Potatoes | Semi-hardy | — (direct sow) | Plant seed potatoes: Mar 13 – Mar 27 | Jul 14 | 125 |
| Radishes | Hardy | — (direct sow) | Direct sow: Feb 27 – Mar 13 | Oct 24 | 30 |
| Spinach | Hardy | — (direct sow) | Direct sow: Feb 27 – Mar 13 | Oct 14 | 40 |
| Swiss chard | Semi-hardy | — (direct sow) | Direct sow: Mar 13 – Mar 27 | Sep 17 | 60 |
| Turnips | Hardy | — (direct sow) | Direct sow: Feb 27 – Mar 13 | Oct 4 | 50 |
| Snap beans | Tender | — (direct sow) | Direct sow: Mar 27 – Apr 3 | Sep 10 | 60 |
| Cantaloupe | Very tender | Mar 20 – Apr 10 | Direct sow (or transplant): Apr 10 – Apr 24 | Aug 16 | 85 |
| Sweet corn | Tender | — (direct sow) | Direct sow: Mar 27 – Apr 3 | Aug 11 | 60–90 |
| Cucumbers | Tender | Mar 6 – Mar 20 | Direct sow (or transplant): Mar 27 – Apr 3 | Sep 15 | 55 |
| Eggplant | Very tender | Feb 6 – Mar 13 | Transplant: Apr 10 – Apr 24 | Sep 10 | 60 (from transplant) |
| Peppers | Very tender | Feb 13 – Mar 13 | Transplant: Apr 10 – Apr 24 | Aug 31 | 70 (from transplant) |
| Tomatoes | Very tender | Feb 20 – Mar 20 | Transplant: Apr 10 – Apr 24 | Sep 5 | 65 (from transplant) |
| Summer squash | Tender | Mar 6 – Mar 20 | Direct sow (or transplant): Mar 27 – Apr 3 | Sep 20 | 50 |
| Winter squash | Very tender | Mar 20 – Apr 10 | Direct sow (or transplant): Apr 10 – Apr 24 | Aug 1 | 100 |
| Watermelon | Very tender | Mar 20 – Apr 10 | Direct sow (or transplant): Apr 10 – Apr 24 | Aug 16 | 85 |
What the Oklahoma City, Oklahoma frost-free season means for your choices
At 227 frost-free days, Oklahoma City, Oklahoma gardeners should compare that number to the days-to-harvest column before buying seed. A crop whose days to harvest plus its transplant age is close to the season length needs either an early start indoors or a short-season variety.
- Hardy crops (peas, spinach, radishes, lettuce, broccoli, cabbage) can go in from about Feb 27 – Mar 13 and again for fall.
- Very tender crops (tomatoes, peppers, eggplant, melons, winter squash) should wait until Apr 10 – Apr 24; start tomato seeds indoors Feb 20 – Mar 20.
- Fall sowing is worthwhile only for the rows that show a separate fall date; for the others the spring window already covers the season.
Oklahoma City, OK planting questions
When is the last frost in Oklahoma City, Oklahoma?
The 50% probability date for the last spring 32°F reading at OKLAHOMA CITY WILL ROGERS WORLD AIRPORT, OK US is Mar 27, from the NOAA 1991–2020 climate normals. In half the years on that record the last frost came later than that date, so tender crops are safer a week or two after it. The last 28°F hard freeze averages Mar 13.
When can I plant tomatoes in Oklahoma City, Oklahoma?
Tomatoes are a very tender crop, so the Colorado State Extension rule puts them out 2 or more weeks after the last spring frost: Apr 10 – Apr 24 in Oklahoma City, Oklahoma. Start the seeds indoors Feb 20 – Mar 20, which is 5 to 7 weeks before that transplant window.
How long is the growing season in Oklahoma City, Oklahoma?
Oklahoma City, Oklahoma averages 227 frost-free days, between the 50% last spring frost on Mar 27 and the 50% first fall frost on Nov 9 at OKLAHOMA CITY WILL ROGERS WORLD AIRPORT, OK US. Check a variety's days to harvest against that number before buying seed.
When should I start seeds indoors in Oklahoma City, Oklahoma?
The earliest indoor sowing on this calendar is broccoli and cabbage at Jan 9 – Feb 6. Hardy crops are transplanted out Feb 27 – Mar 13 here, and each crop's indoor window is simply its outdoor window minus the transplant age published by Colorado State Extension, so nothing starts earlier than that.
What can I plant in fall in Oklahoma City, Oklahoma?
The crops with a separate fall sowing here, latest first, are radishes, spinach, kohlrabi, turnips, lettuce (leaf) and onions (green), plus 21 more on the chart above. Each fall date counts the crop's days to harvest back from the first fall frost on Nov 9, plus an allowance for frost-tolerant crops that is our own assumption, not the source's.
Station data and limitations
| NOAA station | OKLAHOMA CITY WILL ROGERS WORLD AIRPORT, OK US (USW00013967) |
|---|---|
| Location | 35.3889, -97.6006 · elevation 391.7 m |
| Last spring 32°F / 28°F (50%) | Mar 27 / Mar 13 |
| First fall 32°F / 28°F (50%) | Nov 9 / Nov 19 |
| Dataset | NOAA/NCEI U.S. Climate Normals 1991–2020, annual/seasonal product, data types ANN-TMIN-PRBLST/PRBFST-T32FP50 and T28FP50 |
| Retrieved | 2026-10-16 |
The normals describe the airport station, not your yard. They are averages of a 30-year record and say nothing about this year's weather. Watch the local forecast around the dates shown, and use soil temperature for warm-season crops, which the Colorado State guide treats as the better signal.
Nearby calendars
- Dallas–Fort Worth, Texas — last spring frost Mar 8
- Kansas City, Missouri — last spring frost Apr 12
- Austin, Texas — last spring frost Feb 19
- Houston, Texas — last spring frost Feb 18
Read the method behind these dates: last frost date vs hardiness zone.