Fall in zone 7bPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 74840 (Earlsboro, OK)
Average last spring and first fall frost dates with 10%, 50% and 90% odds, from NOAA's 1991–2020 climate normals for the nearest weather station, Seminole, OK (8 miles away).
- Average last spring frostApr 550% chance of a 32°F freeze after this date
- Average first fall frostNov 150% chance of a 32°F freeze by this date
- Growing season (frost-free)210 daysmedian, 32°F threshold
- USDA hardiness zone7b5 to 10°F avg. coldest night
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This week in your yard
As of Oct 18, 2026, from your frost dates, zone and soil temperature. Lawn timing · Vegetables · Pruning · Plants
Soil temperature now
2-inch depth
60°F 55°F or warmer
24-hour average · latest 57°F, as of Oct 18, 1:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Stillwater 2 W (59 mi), Stillwater 5 WNW (60 mi).
4-inch depth
63°F 55°F or warmer
24-hour average · latest 62°F, as of Oct 18, 1:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Stillwater 2 W (59 mi), Stillwater 5 WNW (60 mi).
Fall: Texas A&M AgriLife times fall pre-emergent (for winter weeds such as annual bluegrass) to soil cooling to about 70°F for several days. The 50–55°F band is the spring trigger. Always read and follow the product label.
7-day forecast and frost risk
The latest National Weather Service 7-day forecast and any Frost Advisory or Freeze Warning for 74840 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 63°F at 4 inches (estimated soil temperature, not a station reading). Fall pre-emergent (annual bluegrass, winter weeds): window open as soil cools through the 70s and 60s.
Fertilizer window
Lawn region: South Central plains. Timing only; always follow the product label.
- Bermudagrass (warm-season): Spring: Several weeks after the lawn is fully green (April–May) (about May 21 here, using green-up about 3–4 weeks after your average last frost); Summer: Every 4–6 weeks through mid-August (heaviest feeder of the group); Late: Light, low-nitrogen/high-potassium feeding about 4 weeks before first frost, or skip. Avoid: Heavy late-fall nitrogen (linked to spring dead spot).
- Tall fescue (cool-season): Early fall: September (main feeding); Late fall: November, while still green; Late winter: Optional light feeding February–March. Avoid: Feeding after mid-spring and through summer in the transition zone (stress and brown patch).
Plant now
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Nov 1: skip heavy pruning in the 6–8 weeks before it, because new growth may not harden off in time.
Spring-flowering shrubs are pruned right after their flowers fade, not by date. See the pruning guide.
Last spring frost odds
| Chance of a 32°F freeze after this date | Date |
|---|---|
| 90% (early: most years still freeze after this) | Mar 18 |
| 50% (the "average" last frost) | Apr 5 |
| 10% (cautious: only 1 year in 10 freezes later) | Apr 22 |
Most gardeners plant frost-tender crops (tomatoes, peppers, basil) after the 50% date, and closer to the 10% date for less risk.
First fall frost odds
| Chance the first 32°F freeze has happened by this date | Date |
|---|---|
| 10% (early: 1 year in 10 freezes this soon) | Oct 18 |
| 50% (the "average" first frost) | Nov 1 |
| 90% (late: most years have frozen by now) | Nov 15 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Apr 16 | Oct 24 |
| 32°F (freeze) | Apr 5 | Nov 1 |
| 28°F (hard freeze) | Mar 24 | Nov 9 |
n/a means NOAA did not publish a date at that threshold for this station (usually because it rarely gets that cold).
Vegetable planting calendar for 74840
Dates count from your average last spring frost (Apr 5) and first fall frost (Nov 1). Half of years have a frost after the spring date, so give tender crops (tomatoes, peppers, squash) some slack.
| Crop | Start indoors | Spring planting | Fall planting |
|---|---|---|---|
| Tomato | Feb 8–22 | Apr 12–26 (transplant) | Jul 5–Aug 2 (transplant) |
| Pepper (sweet and hot) | Jan 25–Feb 8 | Apr 19–May 3 (transplant) | Jul 12–Aug 2 (transplant) |
| Eggplant | Jan 25–Feb 8 | Apr 19–May 3 (transplant) | Jul 12–Aug 2 (transplant) |
| Tomatillo | Feb 8–22 | Apr 12–26 (transplant) | – |
| Lettuce | Feb 8–22 | Mar 15–Apr 5 (transplant) Mar 8–Apr 19 (sow outdoors) | Sep 6–27 (transplant) Aug 23–Sep 20 (sowing) |
| Spinach | – | Feb 22–Mar 15 (sow outdoors) | Sep 6–27 (sowing) |
| Kale | Feb 8–22 | Mar 8–22 (transplant) Mar 8–22 (sow outdoors) | Aug 9–Sep 6 (transplant) Jul 26–Aug 23 (sowing) |
| Collards | Feb 8–22 | Mar 8–Apr 5 (transplant) Mar 8–Apr 5 (sow outdoors) | Aug 9–Sep 6 (transplant) Jul 26–Aug 23 (sowing) |
| Broccoli | Jan 25–Feb 8 | Mar 8–22 (transplant) | Jul 26–Aug 23 (transplant) |
| Cabbage | Jan 25–Feb 8 | Mar 8–22 (transplant) | Jul 26–Aug 23 (transplant) |
| Cauliflower | Jan 25–Feb 8 | Mar 22–Apr 5 (transplant) | Jul 26–Aug 23 (transplant) |
| Brussels sprouts | Jan 11–25 | Mar 8–22 (transplant) | Jul 12–Aug 2 (transplant) |
| Kohlrabi | Feb 8–22 | Mar 8–22 (transplant) Mar 8–22 (sow outdoors) | Aug 23–Sep 6 (sowing) |
| Bok choy / Asian greens | – | Mar 8–22 (sow outdoors) | Sep 6–20 (sowing) |
| Arugula | – | Mar 8–Apr 5 (sow outdoors) | Sep 6–Oct 4 (sowing) |
| Mustard greens | – | Mar 8–29 (sow outdoors) | Sep 6–20 (sowing) |
| Swiss chard | Feb 22–Mar 8 | Mar 22–Apr 12 (transplant) Mar 22–Apr 19 (sow outdoors) | Aug 23–Sep 6 (sowing) |
| Beet | – | Mar 8–Apr 5 (sow outdoors) | Aug 23–Sep 6 (sowing) |
| Carrot | – | Mar 15–Apr 12 (sow outdoors) | Aug 9–23 (sowing) |
| Radish | – | Mar 1–Apr 12 (sow outdoors) | Sep 20–Oct 4 (sowing) |
| Turnip | – | Mar 8–29 (sow outdoors) | Aug 23–Sep 6 (sowing) |
| Parsnip | – | Mar 15–Apr 5 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Feb 8–Mar 8 (sow outdoors) | Aug 9–23 (sowing) |
| Onion (bulbing) | Jan 11–25 | Feb 22–Mar 8 (transplant) | – |
| Green onion / scallion | – | Feb 22–Mar 22 (sow outdoors) | Aug 23–Sep 6 (sowing) |
| Leek | Jan 11–25 | Mar 8–22 (transplant) | – |
| Garlic | – | – | Sep 20–Oct 18 (sowing) |
| Shallot | – | Feb 22–Mar 8 (transplant) | Sep 20–Oct 18 (sowing) |
| Potato | – | Mar 8–22 (transplant) | Jul 12–26 (transplant) |
| Sweet potato | – | Apr 26–May 10 (transplant) | – |
| Sweet corn | – | Apr 12–26 (sow outdoors) | – |
| Bean, bush (snap) | – | Apr 12–26 (sow outdoors) | Aug 9–23 (sowing) |
| Bean, pole | – | Apr 12–26 (sow outdoors) | – |
| Lima bean | – | Apr 19–May 3 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Apr 26–May 17 (sow outdoors) | – |
| Cucumber | Mar 8–15 | Apr 12–26 (transplant) Apr 12–26 (sow outdoors) | Aug 9–23 (sowing) |
| Summer squash / zucchini | Mar 8–15 | Apr 12–26 (transplant) Apr 12–26 (sow outdoors) | Aug 9–23 (sowing) |
| Winter squash | Mar 8–15 | Apr 12–26 (transplant) Apr 12–26 (sow outdoors) | – |
| Pumpkin | – | Apr 12–26 (sow outdoors) | – |
| Watermelon | Mar 8–15 | Apr 19–May 3 (transplant) Apr 19–May 3 (sow outdoors) | – |
| Cantaloupe / muskmelon | Mar 8–15 | Apr 19–May 3 (transplant) Apr 19–May 3 (sow outdoors) | – |
| Okra | Feb 22–Mar 8 | Apr 19–May 3 (transplant) Apr 19–May 3 (sow outdoors) | – |
| Celery | Jan 11–25 | Apr 12–19 (transplant) | – |
| Basil | Feb 22–Mar 8 | Apr 12–26 (transplant) Apr 12–26 (sow outdoors) | – |
| Cilantro | – | Mar 22–Apr 19 (sow outdoors) | Sep 6–20 (sowing) |
| Parsley | Jan 25–Feb 8 | Mar 22–Apr 5 (transplant) Mar 15–Apr 5 (sow outdoors) | – |
| Dill | – | Apr 5–19 (sow outdoors) | Sep 6–20 (sowing) |
| Sunflower | – | Apr 5–19 (sow outdoors) | – |
| Asparagus (crowns) | – | Mar 8–22 (transplant) | – |
| Rhubarb (crowns) | – | Mar 8–22 (transplant) | – |
| Strawberry (plants) | – | Mar 8–22 (transplant) | Aug 23–Sep 20 (transplant) |
Typical ranges from university extension planting calendars, adjusted to your frost dates. Probabilities, not guarantees. Fall windows that would overlap spring planting are left out, as are fall crops of frost-tender plants where the frost-free season is under 210 days.
Plants that do well here
Oklahoma has a university or garden plant program: Oklahoma Proven. Plant frost-tender annuals after April 5 here (the average last frost). Not affiliated with the program.
Where these numbers come from
Station: Seminole, OK (NOAA GHCN-Daily ID USC00348042), elevation 924 ft, 8.5 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Seminole 4SSW Mesonet, OK | 10 mi | Apr 1 | Nov 1 |
| Shawnee 3NNW Mesonet, OK | 11 mi | Mar 30 | Nov 5 |
| Meeker 5 W, OK | 18 mi | Apr 4 | Oct 30 |
The average last-frost dates of these stations span 6 days, a rough guide to local variation. See data sources & methods.
Frost questions for 74840
When is the last frost in 74840?
The average (50% chance) last spring freeze of 32°F for ZIP 74840 is April 5. For a more cautious planting date, use April 22, when only 1 year in 10 still sees a later freeze.
When is the first frost in 74840?
The average first fall freeze is November 1. In 1 year in 10 it comes by October 18.
What hardiness zone is 74840?
ZIP 74840 is in USDA zone 7b (5 to 10°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 74840 right now?
This page shows the latest 2-inch and 4-inch soil temperature from the nearest public soil station (USDA SCAN, NOAA USCRN or TexMesonet), or a labeled estimate when no station is close, against the 50–55°F spring pre-emergent band.
Nearby ZIP codes
74868 Seminole 74804 Shawnee 74801 Shawnee 74830 Bowlegs 74873 Pink 74864 Prague 74854 Maud 74855 Meeker
Other ZIP codes in Seminole County
74830 74837 74849 74867 74868 74884 All Seminole County frost dates · Oklahoma frost dates
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Free. One weekly email plus alerts when your ZIP has a frost or a soil-temperature change worth acting on. After you submit, Kit (our email provider) sends a confirmation email: check your email and click the link to confirm. You aren't subscribed until you do. We collect only your email address and ZIP, sent to Kit to deliver The Dial. Unsubscribe anytime.