Fall in zone 7aPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 42122 (Warren County, KY)
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, Bowling Green Warren Co AP, KY (8 miles away).
- Average last spring frostApr 550% chance of a 32°F freeze after this date
- Average first fall frostOct 3150% chance of a 32°F freeze by this date
- Growing season (frost-free)208 daysmedian, 32°F threshold
- USDA hardiness zone7a0 to 5°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
64°F 55°F or warmer
24-hour average · latest 60°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Bowling Green 21 NNE (28 mi), Mammoth Cave (29 mi).
4-inch depth
65°F 55°F or warmer
24-hour average · latest 62°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Bowling Green 21 NNE (28 mi), Mammoth Cave (29 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 42122 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 65°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: Transition zone. 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
No vegetable planting windows are open this week.
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Oct 31: 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 20 |
| 50% (the "average" last frost) | Apr 5 |
| 10% (cautious: only 1 year in 10 freezes later) | Apr 21 |
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 20 |
| 50% (the "average" first frost) | Oct 31 |
| 90% (late: most years have frozen by now) | Nov 11 |
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 22 |
| 32°F (freeze) | Apr 5 | Oct 31 |
| 28°F (hard freeze) | Mar 24 | Nov 10 |
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 42122
Dates count from your average last spring frost (Apr 5) and first fall frost (Oct 31). 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) | – |
| Pepper (sweet and hot) | Jan 25–Feb 8 | Apr 19–May 3 (transplant) | – |
| Eggplant | Jan 25–Feb 8 | Apr 19–May 3 (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 5–26 (transplant) Aug 22–Sep 19 (sowing) |
| Spinach | – | Feb 22–Mar 15 (sow outdoors) | Sep 5–26 (sowing) |
| Kale | Feb 8–22 | Mar 8–22 (transplant) Mar 8–22 (sow outdoors) | Aug 8–Sep 5 (transplant) Jul 25–Aug 22 (sowing) |
| Collards | Feb 8–22 | Mar 8–Apr 5 (transplant) Mar 8–Apr 5 (sow outdoors) | Aug 8–Sep 5 (transplant) Jul 25–Aug 22 (sowing) |
| Broccoli | Jan 25–Feb 8 | Mar 8–22 (transplant) | Jul 25–Aug 22 (transplant) |
| Cabbage | Jan 25–Feb 8 | Mar 8–22 (transplant) | Jul 25–Aug 22 (transplant) |
| Cauliflower | Jan 25–Feb 8 | Mar 22–Apr 5 (transplant) | Jul 25–Aug 22 (transplant) |
| Brussels sprouts | Jan 11–25 | Mar 8–22 (transplant) | Jul 11–Aug 1 (transplant) |
| Kohlrabi | Feb 8–22 | Mar 8–22 (transplant) Mar 8–22 (sow outdoors) | Aug 22–Sep 5 (sowing) |
| Bok choy / Asian greens | – | Mar 8–22 (sow outdoors) | Sep 5–19 (sowing) |
| Arugula | – | Mar 8–Apr 5 (sow outdoors) | Sep 5–Oct 3 (sowing) |
| Mustard greens | – | Mar 8–29 (sow outdoors) | Sep 5–19 (sowing) |
| Swiss chard | Feb 22–Mar 8 | Mar 22–Apr 12 (transplant) Mar 22–Apr 19 (sow outdoors) | Aug 22–Sep 5 (sowing) |
| Beet | – | Mar 8–Apr 5 (sow outdoors) | Aug 22–Sep 5 (sowing) |
| Carrot | – | Mar 15–Apr 12 (sow outdoors) | Aug 8–22 (sowing) |
| Radish | – | Mar 1–Apr 12 (sow outdoors) | Sep 19–Oct 3 (sowing) |
| Turnip | – | Mar 8–29 (sow outdoors) | Aug 22–Sep 5 (sowing) |
| Parsnip | – | Mar 15–Apr 5 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Feb 8–Mar 8 (sow outdoors) | Aug 8–22 (sowing) |
| Onion (bulbing) | Jan 11–25 | Feb 22–Mar 8 (transplant) | – |
| Green onion / scallion | – | Feb 22–Mar 22 (sow outdoors) | Aug 22–Sep 5 (sowing) |
| Leek | Jan 11–25 | Mar 8–22 (transplant) | – |
| Garlic | – | – | Sep 19–Oct 17 (sowing) |
| Shallot | – | Feb 22–Mar 8 (transplant) | Sep 19–Oct 17 (sowing) |
| Potato | – | Mar 8–22 (transplant) | Jul 11–25 (transplant) |
| Sweet potato | – | Apr 26–May 10 (transplant) | – |
| Sweet corn | – | Apr 12–26 (sow outdoors) | – |
| Bean, bush (snap) | – | Apr 12–26 (sow outdoors) | – |
| 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) | – |
| Summer squash / zucchini | Mar 8–15 | Apr 12–26 (transplant) Apr 12–26 (sow outdoors) | – |
| 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 5–19 (sowing) |
| Parsley | Jan 25–Feb 8 | Mar 22–Apr 5 (transplant) Mar 15–Apr 5 (sow outdoors) | – |
| Dill | – | Apr 5–19 (sow outdoors) | Sep 5–19 (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 22–Sep 19 (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.
Where these numbers come from
Station: Bowling Green Warren Co AP, KY (NOAA GHCN-Daily ID USW00093808), elevation 523 ft, 8.4 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Scottsville, KY | 10 mi | Apr 15 | Oct 25 |
| Barren Rvr Lake, KY | 13 mi | Apr 12 | Oct 29 |
| Portland Sewage Plt, TN | 21 mi | Apr 5 | Nov 1 |
The average last-frost dates of these stations span 10 days, a rough guide to local variation. See data sources & methods.
Frost questions for 42122
When is the last frost in 42122?
The average (50% chance) last spring freeze of 32°F for ZIP 42122 is April 5. For a more cautious planting date, use April 21, when only 1 year in 10 still sees a later freeze.
When is the first frost in 42122?
The average first fall freeze is October 31. In 1 year in 10 it comes by October 20.
What hardiness zone is 42122?
ZIP 42122 is in USDA zone 7a (0 to 5°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 42122 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
42104 Bowling Green 42103 Bowling Green 42159 Oakland 42164 Scottsville 42170 Woodburn 42120 42134 Franklin 42274
Other ZIP codes in Warren County
42101 42103 42104 42159 42170 42171 42274 All Warren County frost dates · Kentucky frost dates
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Weekly yard timing, plus frost and soil-temperature alerts for your ZIP code.
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