Fall in zone 7bPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 37330 (Estill Springs, TN)
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, Tullahoma, TN (6 miles away).
- Average last spring frostApr 650% chance of a 32°F freeze after this date
- Average first fall frostOct 3050% chance of a 32°F freeze by this date
- Growing season (frost-free)207 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
64°F 55°F or warmer
24-hour average · latest 61°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of McAllister Farm (30 mi), Wtars (35 mi), Bragg Farm (38 mi).
4-inch depth
66°F 55°F or warmer
24-hour average · latest 64°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of McAllister Farm (30 mi), Wtars (35 mi), Bragg Farm (38 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 37330 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 66°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 22 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 30: 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 21 |
| 50% (the "average" last frost) | Apr 6 |
| 10% (cautious: only 1 year in 10 freezes later) | Apr 23 |
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) | Oct 30 |
| 90% (late: most years have frozen by now) | Nov 12 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Apr 19 | Oct 21 |
| 32°F (freeze) | Apr 6 | Oct 30 |
| 28°F (hard freeze) | Mar 26 | Nov 8 |
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 37330
Dates count from your average last spring frost (Apr 6) and first fall frost (Oct 30). 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 9–23 | Apr 13–27 (transplant) | – |
| Pepper (sweet and hot) | Jan 26–Feb 9 | Apr 20–May 4 (transplant) | – |
| Eggplant | Jan 26–Feb 9 | Apr 20–May 4 (transplant) | – |
| Tomatillo | Feb 9–23 | Apr 13–27 (transplant) | – |
| Lettuce | Feb 9–23 | Mar 16–Apr 6 (transplant) Mar 9–Apr 20 (sow outdoors) | Sep 4–25 (transplant) Aug 21–Sep 18 (sowing) |
| Spinach | – | Feb 23–Mar 16 (sow outdoors) | Sep 4–25 (sowing) |
| Kale | Feb 9–23 | Mar 9–23 (transplant) Mar 9–23 (sow outdoors) | Aug 7–Sep 4 (transplant) Jul 24–Aug 21 (sowing) |
| Collards | Feb 9–23 | Mar 9–Apr 6 (transplant) Mar 9–Apr 6 (sow outdoors) | Aug 7–Sep 4 (transplant) Jul 24–Aug 21 (sowing) |
| Broccoli | Jan 26–Feb 9 | Mar 9–23 (transplant) | Jul 24–Aug 21 (transplant) |
| Cabbage | Jan 26–Feb 9 | Mar 9–23 (transplant) | Jul 24–Aug 21 (transplant) |
| Cauliflower | Jan 26–Feb 9 | Mar 23–Apr 6 (transplant) | Jul 24–Aug 21 (transplant) |
| Brussels sprouts | Jan 12–26 | Mar 9–23 (transplant) | Jul 10–31 (transplant) |
| Kohlrabi | Feb 9–23 | Mar 9–23 (transplant) Mar 9–23 (sow outdoors) | Aug 21–Sep 4 (sowing) |
| Bok choy / Asian greens | – | Mar 9–23 (sow outdoors) | Sep 4–18 (sowing) |
| Arugula | – | Mar 9–Apr 6 (sow outdoors) | Sep 4–Oct 2 (sowing) |
| Mustard greens | – | Mar 9–30 (sow outdoors) | Sep 4–18 (sowing) |
| Swiss chard | Feb 23–Mar 9 | Mar 23–Apr 13 (transplant) Mar 23–Apr 20 (sow outdoors) | Aug 21–Sep 4 (sowing) |
| Beet | – | Mar 9–Apr 6 (sow outdoors) | Aug 21–Sep 4 (sowing) |
| Carrot | – | Mar 16–Apr 13 (sow outdoors) | Aug 7–21 (sowing) |
| Radish | – | Mar 2–Apr 13 (sow outdoors) | Sep 18–Oct 2 (sowing) |
| Turnip | – | Mar 9–30 (sow outdoors) | Aug 21–Sep 4 (sowing) |
| Parsnip | – | Mar 16–Apr 6 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Feb 9–Mar 9 (sow outdoors) | Aug 7–21 (sowing) |
| Onion (bulbing) | Jan 12–26 | Feb 23–Mar 9 (transplant) | – |
| Green onion / scallion | – | Feb 23–Mar 23 (sow outdoors) | Aug 21–Sep 4 (sowing) |
| Leek | Jan 12–26 | Mar 9–23 (transplant) | – |
| Garlic | – | – | Sep 18–Oct 16 (sowing) |
| Shallot | – | Feb 23–Mar 9 (transplant) | Sep 18–Oct 16 (sowing) |
| Potato | – | Mar 9–23 (transplant) | Jul 10–24 (transplant) |
| Sweet potato | – | Apr 27–May 11 (transplant) | – |
| Sweet corn | – | Apr 13–27 (sow outdoors) | – |
| Bean, bush (snap) | – | Apr 13–27 (sow outdoors) | – |
| Bean, pole | – | Apr 13–27 (sow outdoors) | – |
| Lima bean | – | Apr 20–May 4 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Apr 27–May 18 (sow outdoors) | – |
| Cucumber | Mar 9–16 | Apr 13–27 (transplant) Apr 13–27 (sow outdoors) | – |
| Summer squash / zucchini | Mar 9–16 | Apr 13–27 (transplant) Apr 13–27 (sow outdoors) | – |
| Winter squash | Mar 9–16 | Apr 13–27 (transplant) Apr 13–27 (sow outdoors) | – |
| Pumpkin | – | Apr 13–27 (sow outdoors) | – |
| Watermelon | Mar 9–16 | Apr 20–May 4 (transplant) Apr 20–May 4 (sow outdoors) | – |
| Cantaloupe / muskmelon | Mar 9–16 | Apr 20–May 4 (transplant) Apr 20–May 4 (sow outdoors) | – |
| Okra | Feb 23–Mar 9 | Apr 20–May 4 (transplant) Apr 20–May 4 (sow outdoors) | – |
| Celery | Jan 12–26 | Apr 13–20 (transplant) | – |
| Basil | Feb 23–Mar 9 | Apr 13–27 (transplant) Apr 13–27 (sow outdoors) | – |
| Cilantro | – | Mar 23–Apr 20 (sow outdoors) | Sep 4–18 (sowing) |
| Parsley | Jan 26–Feb 9 | Mar 23–Apr 6 (transplant) Mar 16–Apr 6 (sow outdoors) | – |
| Dill | – | Apr 6–20 (sow outdoors) | Sep 4–18 (sowing) |
| Sunflower | – | Apr 6–20 (sow outdoors) | – |
| Asparagus (crowns) | – | Mar 9–23 (transplant) | – |
| Rhubarb (crowns) | – | Mar 9–23 (transplant) | – |
| Strawberry (plants) | – | Mar 9–23 (transplant) | Aug 21–Sep 18 (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: Tullahoma, TN (NOAA GHCN-Daily ID USC00409155), elevation 1,022 ft, 6.3 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Winchester 5SE, TN | 10 mi | Apr 6 | Oct 29 |
| Sewanee, TN | 13 mi | Apr 2 | Nov 4 |
| Lynchburg, TN | 13 mi | Apr 15 | Oct 25 |
The average last-frost dates of these stations span 13 days, a rough guide to local variation. See data sources & methods.
Frost questions for 37330
When is the last frost in 37330?
The average (50% chance) last spring freeze of 32°F for ZIP 37330 is April 6. For a more cautious planting date, use April 23, when only 1 year in 10 still sees a later freeze.
When is the first frost in 37330?
The average first fall freeze is October 30. In 1 year in 10 it comes by October 18.
What hardiness zone is 37330?
ZIP 37330 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 37330 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
37388 Lynchburg, Moore County metropolitan government 37398 Winchester 37324 Decherd 37318 Cowan 37352 Lynchburg, Moore County metropolitan government 37342 Hillsboro 37360 Normandy 37306 Lynchburg, Moore County metropolitan government
Other ZIP codes in Franklin County
37306 37318 37324 37345 37375 37376 37383 37398 All Franklin County frost dates · Tennessee frost dates
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