Frost dates for 74133 — Tulsa, OK
How Tulsa compares
- In 8 years out of 10, the last spring frost in Tulsa falls between March 12 and April 20, a 39-day window. The first fall frost falls between October 16 and November 13.
- The median last frost is 3 days earlier than the Oklahoma median of Apr 4.
- Its 214-day growing season is longer than 57% of the 582 Oklahoma places with a regular frost season (state median 211 days).
- The last frost is 4 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 87 nights a year at or below 32°F.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 12 |
| 50% (median) | April 1 |
| 10% (safe for tender plants) | April 20 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 16 |
| 50% (median) | November 1 |
| 90% (late) | November 13 |
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 74133 — Tulsa, OK — last frost Apr 1, first frost Nov 1, zone 7b. whenisthelastfrost.com
When to plant vegetables in Tulsa, OK
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 7 – Jan 21 | Mar 4 – Mar 18 | — | — |
| Peppers | Jan 21 – Feb 4 | Apr 15 – Apr 29 | — | — |
| Eggplant | Jan 21 – Feb 4 | Apr 15 – Apr 29 | — | — |
| Tomatoes | Feb 4 – Feb 18 | Apr 8 – Apr 22 | — | — |
| Lettuce | Feb 4 – Feb 18 | Mar 11 – Mar 25 | Mar 4 – Apr 8 | Sep 6 – Oct 4 |
| Kale | Feb 4 – Feb 18 | Mar 4 – Mar 18 | Mar 4 – Mar 18 | Aug 23 – Sep 13 |
| Broccoli | Feb 4 – Feb 18 | Mar 18 – Apr 1 | — | Jul 26 – Aug 16 |
| Cabbage | Feb 4 – Feb 18 | Mar 11 – Mar 25 | — | Jul 26 – Aug 16 |
| Cauliflower | Feb 4 – Feb 18 | Mar 18 – Apr 1 | — | Jul 26 – Aug 16 |
| Okra | Feb 18 – Mar 4 | Apr 22 – May 6 | Apr 22 – May 6 | — |
| Basil | Feb 18 – Mar 4 | Apr 8 – Apr 22 | — | — |
| Peas | — | — | Feb 18 – Mar 11 | Aug 9 – Aug 30 |
| Spinach | — | — | Feb 18 – Mar 11 | Sep 6 – Sep 27 |
| Radishes | — | — | Feb 25 – Apr 8 | Sep 20 – Oct 11 |
| Cucumbers | Mar 4 – Mar 11 | Apr 15 – Apr 22 | Apr 8 – Apr 22 | Aug 16 – Aug 30 |
| Zucchini & Summer Squash | Mar 4 – Mar 11 | — | Apr 8 – Apr 22 | Aug 23 – Sep 6 |
| Winter Squash & Pumpkins | Mar 4 – Mar 11 | — | Apr 8 – Apr 22 | — |
| Melons & Watermelon | Mar 4 – Mar 11 | Apr 15 – Apr 29 | — | — |
| Carrots | — | — | Mar 11 – Apr 8 | Aug 9 – Aug 23 |
| Beets | — | — | Mar 11 – Apr 8 | Aug 23 – Sep 6 |
| Potatoes | — | — | Mar 11 – Apr 1 | — |
| Swiss Chard | — | — | Mar 18 – Apr 15 | Aug 23 – Sep 6 |
| Cilantro | — | — | Mar 18 – Apr 8 | Sep 6 – Sep 27 |
| Green Beans | — | — | Apr 8 – Apr 29 | Aug 16 – Aug 30 |
| Sweet Corn | — | — | Apr 8 – Apr 22 | — |
| Sweet Potatoes | — | Apr 15 – May 6 | — | — |
| Garlic | — | — | — | Oct 18 – Nov 22 |
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 Bixby, OK weather station, 7 km away (elevation 604 ft (184 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
- Broken Arrow Apr 1 · Nov 1
- Jenks Mar 30 · Nov 4
- Bixby Apr 1 · Nov 1
- Glenpool Mar 30 · Nov 4
- Leonard Apr 1 · Nov 1
- Oakhurst Mar 30 · Nov 4
- Kiefer Mar 30 · Nov 4
- Catoosa Mar 31 · Nov 4
Frequently asked questions
When is the last frost in Tulsa, OK?
The median last spring frost in Tulsa, OK is April 1. There is still about a 10% chance of frost after April 20, 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 1, with about a 10% chance of frost before October 16.
How long is the growing season in Tulsa, OK?
About 214 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.