Frost dates & planting calendar for Tulsa, OK
Frost dates
Mar 31
Last spring frost, typical
In half of the years that freeze, the last frost comes later.
Safer date: Apr 15. Only 1 freeze year in 10 has a frost after this.
Nov 4
First fall frost, typical
In half of the years that freeze, it comes earlier.
Early date: Oct 20. Only 1 freeze year in 10 freezes before this.
220
Days, typical frost-free season
From NOAA’s 1991–2020 climate normals for this station.
7b
USDA hardiness zone
Coldest night of the winter, averaged over 1991–2020: 5 to 10°F (−15.0 to −12.2°C).
Zone for ZIP 74112, the ZIP nearest the city center; zones can vary within a city. What zone 7b means.
What to plant right now
As of Nov 9, 2026
Typical frost-free season: 220 days. Station: Tulsa International Airport, OK, 8 km away. Source: NOAA NCEI U.S. Climate Normals 1991–2020 (32°F threshold).
Hardiness zones: 2023 USDA Plant Hardiness Zone Map, PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed 9 Nov 2026.
Can I plant tomatoes now?
Not yet. Start tomato seeds indoors from Feb 18 to Mar 4, then plant them out from Apr 15 to Apr 29.
Planting calendar
Windows are counted from the safer dates (Apr 15 in spring, Oct 20 in fall). Going by the typical dates instead gains you about 2 weeks in spring, with more risk.
February
The next window opens in February.
Peppertender
Next: start indoors from Feb 4
- Start indoors
- Feb 4 – Feb 18
- Transplant outdoors
- Apr 15 – Apr 29
Parsleyhalf hardy
Next: start indoors from Feb 4
- Start indoors
- Feb 4 – Feb 18
- Sow outdoors
- Apr 1 – Apr 15
Tomatotender
Next: start indoors from Feb 18
- Start indoors
- Feb 18 – Mar 4
- Transplant outdoors
- Apr 15 – Apr 29
Eggplanttender
Next: start indoors from Feb 18
- Start indoors
- Feb 18 – Mar 4
- Transplant outdoors
- Apr 15 – Apr 29
Broccolihardy
Next: start indoors from Feb 18
- Start indoors
- Feb 18 – Mar 4
- Transplant outdoors
- Mar 18 – Apr 15
- Sow outdoors
- Mar 18 – Apr 1
- Sow for fall
- Jul 28 – Aug 11
Cabbagehardy
Next: start indoors from Feb 18
- Start indoors
- Feb 18 – Mar 4
- Transplant outdoors
- Mar 18 – Apr 15
- Sow outdoors
- Mar 18 – Apr 1
- Sow for fall
- Jul 28 – Aug 11
Cauliflowerhalf hardy
Next: start indoors from Feb 18
- Start indoors
- Feb 18 – Mar 4
- Transplant outdoors
- Apr 1 – Apr 15
- Sow outdoors
- Mar 25 – Apr 15
- Sow for fall
- Jul 28 – Aug 11
Brussels sproutshardy
Next: start indoors from Feb 18
- Start indoors
- Feb 18 – Mar 4
- Sow outdoors
- Mar 25 – Mar 25
- Sow for fall
- Jul 28 – Aug 11
Marigoldtender
Next: start indoors from Feb 18
- Start indoors
- Feb 18 – Feb 18
- Transplant outdoors
- Apr 15 – Apr 15
Calendulahalf hardy
Next: start indoors from Feb 18
- Start indoors
- Feb 18 – Mar 4
- Sow outdoors
- Apr 8 – Apr 15
Mexican sunflowertender
Next: start indoors from Feb 18
- Start indoors
- Feb 18 – Mar 4
- Sow outdoors
- Apr 15 – Apr 15
March
The next window opens in March.
Leaf lettucehardy
Next: sow outdoors from Mar 4
- Transplant outdoors
- Mar 18 – Apr 1
- Sow outdoors
- Mar 4 – Apr 1
Head lettucehardy
Next: sow outdoors from Mar 4
- Transplant outdoors
- Mar 18 – Apr 1
- Sow outdoors
- Mar 4 – Apr 1
Zinniatender
Next: start indoors from Mar 4
- Start indoors
- Mar 4 – Mar 18
- Sow outdoors
- Apr 15 – Apr 15
Nasturtiumtender
Next: start indoors from Mar 4
- Start indoors
- Mar 4 – Mar 18
- Sow outdoors
- Apr 15 – Apr 15
Sunflowertender
Next: start indoors from Mar 4
- Start indoors
- Mar 4 – Mar 18
Cucumbertender
Next: start indoors from Mar 18
- Start indoors
- Mar 18 – Apr 1
- Sow outdoors
- Apr 15 – Apr 22
Summer squashtender
Next: start indoors from Mar 18
- Start indoors
- Mar 18 – Apr 1
- Sow outdoors
- Apr 15 – Apr 22
Winter squashtender
Next: start indoors from Mar 18
- Start indoors
- Mar 18 – Apr 1
- Sow outdoors
- Apr 22 – Apr 29
Watermelontender
Next: start indoors from Mar 18
- Start indoors
- Mar 18 – Apr 1
- Transplant outdoors
- Apr 22 – Apr 29
- Sow outdoors
- Apr 22 – Apr 29
Cantaloupetender
Next: start indoors from Mar 18
- Start indoors
- Mar 18 – Mar 25
- Sow outdoors
- Apr 22 – Apr 29
Peahardy
Next: sow outdoors from Mar 18
- Sow outdoors
- Mar 18 – Apr 1
Spinachhardy
Next: sow outdoors from Mar 18
- Sow outdoors
- Mar 18 – Apr 1
Kohlrabihardy
Next: sow outdoors from Mar 18
- Sow outdoors
- Mar 18 – Apr 1
- Sow for fall
- Jul 28 – Aug 11
Radishhardy
Next: sow outdoors from Mar 18
- Sow outdoors
- Mar 18 – Apr 1
Beethalf hardy
Next: sow outdoors from Mar 18
- Sow outdoors
- Mar 18 – Apr 15
Turniphardy
Next: sow outdoors from Mar 18
- Sow outdoors
- Mar 18 – Apr 1
Bulb onionhardy
Next: sow outdoors from Mar 18
- Sow outdoors
- Mar 18 – Apr 1
Green onionhardy
Next: sow outdoors from Mar 18
- Sow outdoors
- Mar 18 – Apr 1
Kalehardy
Next: sow outdoors from Mar 25
- Sow outdoors
- Mar 25 – Mar 25
- Sow for fall
- Jul 28 – Aug 11
Collardshardy
Next: sow outdoors from Mar 25
- Sow outdoors
- Mar 25 – Mar 25
- Sow for fall
- Jul 28 – Aug 11
April
The next window opens in April.
Swiss chardhalf hardy
Next: sow outdoors from Apr 1
- Sow outdoors
- Apr 1 – Apr 15
Carrothalf hardy
Next: sow outdoors from Apr 1
- Sow outdoors
- Apr 1 – Apr 15
Potatohalf hardy
Next: sow outdoors from Apr 1
- Sow outdoors
- Apr 1 – Apr 15
Parsniphalf hardy
Next: sow outdoors from Apr 1
- Sow outdoors
- Apr 1 – Apr 15
Dillhalf hardy
Next: sow outdoors from Apr 1
- Sow outdoors
- Apr 1 – Apr 8
Bush beantender
Next: sow outdoors from Apr 15
- Sow outdoors
- Apr 15 – Apr 15
Pole beantender
Next: sow outdoors from Apr 15
- Sow outdoors
- Apr 15 – Apr 15
Sweet corntender
Next: sow outdoors from Apr 15
- Sow outdoors
- Apr 15 – Apr 15
Basiltender
Next: sow outdoors from Apr 15
- Sow outdoors
- Apr 15 – Apr 15
Marjoramtender
Next: transplant outdoors from Apr 15
- Transplant outdoors
- Apr 15 – Apr 15
Pumpkintender
Next: sow outdoors from Apr 22
- Sow outdoors
- Apr 22 – Apr 29
Lima beantender
Next: sow outdoors from Apr 29
- Sow outdoors
- Apr 29 – Apr 29
September
The next window opens in September.
Sweet alyssumhardy
Next: sow for fall from Sep 8
- Sow for fall
- Sep 8 – Sep 8
No window listed
No frost-based window for these crops.
Mustard greenshalf hardy
No frost-based window listed.
No frost-based sowing window is listed for mustard greens.
Crop guidance from university extension services; see each crop page for sources.
Questions
- When is the last frost in Tulsa?
- The typical last spring frost (32°F) in Tulsa is Mar 31. In 1 out of 10 years that freeze, a frost still comes after Apr 15.
- When is the first frost in Tulsa?
- The typical first fall frost is Nov 4. In 1 out of 10 years that freeze, it arrives before Oct 20.
- When should I start tomato seeds in Tulsa?
- Start tomato seeds indoors between Feb 18 and Mar 4, counting back from the safer last-frost date.
- What planting zone is Tulsa in?
- Tulsa is in USDA hardiness zone 7b on the 2023 map, going by ZIP 74112, the ZIP nearest the city center. Zones can vary within a city. The zone describes how cold winter nights get, not when to plant; for that, use the frost dates on this page.
Nearby cities
- Oklahoma City, OK 163 km
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