Frost dates for 74136 — Tulsa, OK
How Tulsa compares
- In 8 years out of 10, the last spring frost in Tulsa falls between March 10 and April 17, a 38-day window. The first fall frost falls between October 21 and November 20.
- The median last frost is 5 days earlier than the Oklahoma median of Apr 4.
- Its 219-day growing season is longer than 79% of the 582 Oklahoma places with a regular frost season (state median 211 days).
- The last frost is 6 days earlier 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 81 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 10 |
| 50% (median) | March 30 |
| 10% (safe for tender plants) | April 17 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 21 |
| 50% (median) | November 4 |
| 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 Tulsa, OK
Frost dates for 74136 — Tulsa, OK — last frost Mar 30, first frost Nov 4, zone 7b. whenisthelastfrost.com
When to plant vegetables in Tulsa, OK
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 5 – Jan 19 | Mar 2 – Mar 16 | — | — |
| Peppers | Jan 19 – Feb 2 | Apr 13 – Apr 27 | — | — |
| Eggplant | Jan 19 – Feb 2 | Apr 13 – Apr 27 | — | — |
| Tomatoes | Feb 2 – Feb 16 | Apr 6 – Apr 20 | — | — |
| Lettuce | Feb 2 – Feb 16 | Mar 9 – Mar 23 | Mar 2 – Apr 6 | Sep 9 – Oct 7 |
| Kale | Feb 2 – Feb 16 | Mar 2 – Mar 16 | Mar 2 – Mar 16 | Aug 26 – Sep 16 |
| Broccoli | Feb 2 – Feb 16 | Mar 16 – Mar 30 | — | Jul 29 – Aug 19 |
| Cabbage | Feb 2 – Feb 16 | Mar 9 – Mar 23 | — | Jul 29 – Aug 19 |
| Cauliflower | Feb 2 – Feb 16 | Mar 16 – Mar 30 | — | Jul 29 – Aug 19 |
| Okra | Feb 16 – Mar 2 | Apr 20 – May 4 | Apr 20 – May 4 | — |
| Basil | Feb 16 – Mar 2 | Apr 6 – Apr 20 | — | — |
| Peas | — | — | Feb 16 – Mar 9 | Aug 12 – Sep 2 |
| Spinach | — | — | Feb 16 – Mar 9 | Sep 9 – Sep 30 |
| Radishes | — | — | Feb 23 – Apr 6 | Sep 23 – Oct 14 |
| Cucumbers | Mar 2 – Mar 9 | Apr 13 – Apr 20 | Apr 6 – Apr 20 | Aug 19 – Sep 2 |
| Zucchini & Summer Squash | Mar 2 – Mar 9 | — | Apr 6 – Apr 20 | Aug 26 – Sep 9 |
| Winter Squash & Pumpkins | Mar 2 – Mar 9 | — | Apr 6 – Apr 20 | — |
| Melons & Watermelon | Mar 2 – Mar 9 | Apr 13 – Apr 27 | — | — |
| Carrots | — | — | Mar 9 – Apr 6 | Aug 12 – Aug 26 |
| Beets | — | — | Mar 9 – Apr 6 | Aug 26 – Sep 9 |
| Potatoes | — | — | Mar 9 – Mar 30 | — |
| Swiss Chard | — | — | Mar 16 – Apr 13 | Aug 26 – Sep 9 |
| Cilantro | — | — | Mar 16 – Apr 6 | Sep 9 – Sep 30 |
| Green Beans | — | — | Apr 6 – Apr 27 | Aug 19 – Sep 2 |
| Sweet Corn | — | — | Apr 6 – Apr 20 | — |
| Sweet Potatoes | — | Apr 13 – May 4 | — | — |
| Garlic | — | — | — | Oct 21 – Nov 25 |
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 Tulsa R L Jones Jr Ap, OK weather station, 4 km away (elevation 640 ft (195 m)).
ZIP codes in Tulsa: 74101 74102 74103 74104 74105 74106 74107 74108 74110 74112 74114 74115 74116 74117 74119 74120 74121 74126 74127 74128 74129 74130 74131 74132 74133 74134 74135 74136 74137 74141 74145 74146 74147 74148 74149 74150 74152 74153 74155 74156 74157 74158 74159 74169 74170 74171 74172 74182 74186 74187 74192 74193
Frost dates near Tulsa
- Jenks Mar 30 · Nov 4
- Oakhurst Mar 30 · Nov 4
- Glenpool Mar 30 · Nov 4
- Bixby Apr 1 · Nov 1
- Broken Arrow Apr 1 · Nov 1
- Sapulpa Mar 30 · Nov 4
- Kiefer Mar 30 · Nov 4
- Sand Springs Mar 30 · Nov 4
Frequently asked questions
When is the last frost in Tulsa, OK?
The median last spring frost in Tulsa, OK is March 30. There is still about a 10% chance of frost after April 17, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Tulsa, OK?
The median first fall frost is November 4, with about a 10% chance of frost before October 21.
How long is the growing season in Tulsa, OK?
About 219 days between the median last spring frost and first fall frost.
What planting zone is Tulsa, OK?
Tulsa, OK is in USDA hardiness zone 7b.