Fall in zone 7bPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 37690 (Telford, 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, Erwin 1 W, TN (11 miles away).
- Average last spring frostApr 2150% chance of a 32°F freeze after this date
- Average first fall frostOct 2350% chance of a 32°F freeze by this date
- Growing season (frost-free)183 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
61°F 55°F or warmer
24-hour average · latest 56°F, as of Oct 18, 2:00 AM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Asheville 13 S (57 mi).
4-inch depth
No soil station with a fresh reading within 62 miles.
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 37690 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
No soil reading near this ZIP. Typical extension timing for your region: spring early March to early April; fall late August to mid-September.
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 Jun 6 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 23: 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) | Apr 4 |
| 50% (the "average" last frost) | Apr 21 |
| 10% (cautious: only 1 year in 10 freezes later) | May 11 |
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 11 |
| 50% (the "average" first frost) | Oct 23 |
| 90% (late: most years have frozen by now) | Nov 4 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | May 3 | Oct 14 |
| 32°F (freeze) | Apr 21 | Oct 23 |
| 28°F (hard freeze) | Apr 7 | Nov 1 |
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 37690
Dates count from your average last spring frost (Apr 21) and first fall frost (Oct 23). 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 24–Mar 10 | Apr 28–May 12 (transplant) | – |
| Pepper (sweet and hot) | Feb 10–24 | May 5–19 (transplant) | – |
| Eggplant | Feb 10–24 | May 5–19 (transplant) | – |
| Tomatillo | Feb 24–Mar 10 | Apr 28–May 12 (transplant) | – |
| Lettuce | Feb 24–Mar 10 | Mar 31–Apr 21 (transplant) Mar 24–May 5 (sow outdoors) | Aug 28–Sep 18 (transplant) Aug 14–Sep 11 (sowing) |
| Spinach | – | Mar 10–31 (sow outdoors) | Aug 28–Sep 18 (sowing) |
| Kale | Feb 24–Mar 10 | Mar 24–Apr 7 (transplant) Mar 24–Apr 7 (sow outdoors) | Jul 31–Aug 28 (transplant) Jul 17–Aug 14 (sowing) |
| Collards | Feb 24–Mar 10 | Mar 24–Apr 21 (transplant) Mar 24–Apr 21 (sow outdoors) | Jul 31–Aug 28 (transplant) Jul 17–Aug 14 (sowing) |
| Broccoli | Feb 10–24 | Mar 24–Apr 7 (transplant) | Jul 17–Aug 14 (transplant) |
| Cabbage | Feb 10–24 | Mar 24–Apr 7 (transplant) | Jul 17–Aug 14 (transplant) |
| Cauliflower | Feb 10–24 | Apr 7–21 (transplant) | Jul 17–Aug 14 (transplant) |
| Brussels sprouts | Jan 27–Feb 10 | Mar 24–Apr 7 (transplant) | Jul 3–24 (transplant) |
| Kohlrabi | Feb 24–Mar 10 | Mar 24–Apr 7 (transplant) Mar 24–Apr 7 (sow outdoors) | Aug 14–28 (sowing) |
| Bok choy / Asian greens | – | Mar 24–Apr 7 (sow outdoors) | Aug 28–Sep 11 (sowing) |
| Arugula | – | Mar 24–Apr 21 (sow outdoors) | Aug 28–Sep 25 (sowing) |
| Mustard greens | – | Mar 24–Apr 14 (sow outdoors) | Aug 28–Sep 11 (sowing) |
| Swiss chard | Mar 10–24 | Apr 7–28 (transplant) Apr 7–May 5 (sow outdoors) | Aug 14–28 (sowing) |
| Beet | – | Mar 24–Apr 21 (sow outdoors) | Aug 14–28 (sowing) |
| Carrot | – | Mar 31–Apr 28 (sow outdoors) | Jul 31–Aug 14 (sowing) |
| Radish | – | Mar 17–Apr 28 (sow outdoors) | Sep 11–25 (sowing) |
| Turnip | – | Mar 24–Apr 14 (sow outdoors) | Aug 14–28 (sowing) |
| Parsnip | – | Mar 31–Apr 21 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Feb 24–Mar 24 (sow outdoors) | Jul 31–Aug 14 (sowing) |
| Onion (bulbing) | Jan 27–Feb 10 | Mar 10–24 (transplant) | – |
| Green onion / scallion | – | Mar 10–Apr 7 (sow outdoors) | Aug 14–28 (sowing) |
| Leek | Jan 27–Feb 10 | Mar 24–Apr 7 (transplant) | – |
| Garlic | – | – | Sep 11–Oct 9 (sowing) |
| Shallot | – | Mar 10–24 (transplant) | Sep 11–Oct 9 (sowing) |
| Potato | – | Mar 24–Apr 7 (transplant) | Jul 3–17 (transplant) |
| Sweet potato | – | May 12–26 (transplant) | – |
| Sweet corn | – | Apr 28–May 12 (sow outdoors) | – |
| Bean, bush (snap) | – | Apr 28–May 12 (sow outdoors) | – |
| Bean, pole | – | Apr 28–May 12 (sow outdoors) | – |
| Lima bean | – | May 5–19 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | May 12–Jun 2 (sow outdoors) | – |
| Cucumber | Mar 24–31 | Apr 28–May 12 (transplant) Apr 28–May 12 (sow outdoors) | – |
| Summer squash / zucchini | Mar 24–31 | Apr 28–May 12 (transplant) Apr 28–May 12 (sow outdoors) | – |
| Winter squash | Mar 24–31 | Apr 28–May 12 (transplant) Apr 28–May 12 (sow outdoors) | – |
| Pumpkin | – | Apr 28–May 12 (sow outdoors) | – |
| Watermelon | Mar 24–31 | May 5–19 (transplant) May 5–19 (sow outdoors) | – |
| Cantaloupe / muskmelon | Mar 24–31 | May 5–19 (transplant) May 5–19 (sow outdoors) | – |
| Okra | Mar 10–24 | May 5–19 (transplant) May 5–19 (sow outdoors) | – |
| Celery | Jan 27–Feb 10 | Apr 28–May 5 (transplant) | – |
| Basil | Mar 10–24 | Apr 28–May 12 (transplant) Apr 28–May 12 (sow outdoors) | – |
| Cilantro | – | Apr 7–May 5 (sow outdoors) | Aug 28–Sep 11 (sowing) |
| Parsley | Feb 10–24 | Apr 7–21 (transplant) Mar 31–Apr 21 (sow outdoors) | – |
| Dill | – | Apr 21–May 5 (sow outdoors) | Aug 28–Sep 11 (sowing) |
| Sunflower | – | Apr 21–May 5 (sow outdoors) | – |
| Asparagus (crowns) | – | Mar 24–Apr 7 (transplant) | – |
| Rhubarb (crowns) | – | Mar 24–Apr 7 (transplant) | – |
| Strawberry (plants) | – | Mar 24–Apr 7 (transplant) | Aug 14–Sep 11 (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: Erwin 1 W, TN (NOAA GHCN-Daily ID USC00402934), elevation 1,720 ft, 10.6 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Bristol Tri City AP, TN | 18 mi | Apr 16 | Oct 24 |
| Kingsport, TN | 19 mi | Apr 9 | Oct 29 |
| Elizabethton, TN | 19 mi | Apr 19 | Oct 24 |
The average last-frost dates of these stations span 12 days, a rough guide to local variation. See data sources & methods.
Frost questions for 37690
When is the last frost in 37690?
The average (50% chance) last spring freeze of 32°F for ZIP 37690 is April 21. For a more cautious planting date, use May 11, when only 1 year in 10 still sees a later freeze.
When is the first frost in 37690?
The average first fall freeze is October 23. In 1 year in 10 it comes by October 11.
What hardiness zone is 37690?
ZIP 37690 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 37690 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
37681 37659 Jonesborough 37641 37604 Johnson City 37616 37656 Fall Branch 37614 Johnson City 37615 Johnson City
Other ZIP codes in Washington County
37601 37604 37614 37615 37656 37659 37681 All Washington County frost dates · Tennessee frost dates
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- Freeze alerts
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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.