Fall in zone 7aPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 22737 (Culpeper County, VA)
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, Boston 4 SE, VA (6 miles away).
- Average last spring frostApr 2150% chance of a 32°F freeze after this date
- Average first fall frostOct 2250% chance of a 32°F freeze by this date
- Growing season (frost-free)184 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
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 N Piedmont Arec (26 mi), Charlottesville 2 SSE (48 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 N Piedmont Arec (26 mi), Charlottesville 2 SSE (48 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 22737 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 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 22: 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 5 |
| 50% (the "average" last frost) | Apr 21 |
| 10% (cautious: only 1 year in 10 freezes later) | May 10 |
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 8 |
| 50% (the "average" first frost) | Oct 22 |
| 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 13 |
| 32°F (freeze) | Apr 21 | Oct 22 |
| 28°F (hard freeze) | Apr 5 | 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 22737
Dates count from your average last spring frost (Apr 21) and first fall frost (Oct 22). 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 27–Sep 17 (transplant) Aug 13–Sep 10 (sowing) |
| Spinach | – | Mar 10–31 (sow outdoors) | Aug 27–Sep 17 (sowing) |
| Kale | Feb 24–Mar 10 | Mar 24–Apr 7 (transplant) Mar 24–Apr 7 (sow outdoors) | Jul 30–Aug 27 (transplant) Jul 16–Aug 13 (sowing) |
| Collards | Feb 24–Mar 10 | Mar 24–Apr 21 (transplant) Mar 24–Apr 21 (sow outdoors) | Jul 30–Aug 27 (transplant) Jul 16–Aug 13 (sowing) |
| Broccoli | Feb 10–24 | Mar 24–Apr 7 (transplant) | Jul 16–Aug 13 (transplant) |
| Cabbage | Feb 10–24 | Mar 24–Apr 7 (transplant) | Jul 16–Aug 13 (transplant) |
| Cauliflower | Feb 10–24 | Apr 7–21 (transplant) | Jul 16–Aug 13 (transplant) |
| Brussels sprouts | Jan 27–Feb 10 | Mar 24–Apr 7 (transplant) | Jul 2–23 (transplant) |
| Kohlrabi | Feb 24–Mar 10 | Mar 24–Apr 7 (transplant) Mar 24–Apr 7 (sow outdoors) | Aug 13–27 (sowing) |
| Bok choy / Asian greens | – | Mar 24–Apr 7 (sow outdoors) | Aug 27–Sep 10 (sowing) |
| Arugula | – | Mar 24–Apr 21 (sow outdoors) | Aug 27–Sep 24 (sowing) |
| Mustard greens | – | Mar 24–Apr 14 (sow outdoors) | Aug 27–Sep 10 (sowing) |
| Swiss chard | Mar 10–24 | Apr 7–28 (transplant) Apr 7–May 5 (sow outdoors) | Aug 13–27 (sowing) |
| Beet | – | Mar 24–Apr 21 (sow outdoors) | Aug 13–27 (sowing) |
| Carrot | – | Mar 31–Apr 28 (sow outdoors) | Jul 30–Aug 13 (sowing) |
| Radish | – | Mar 17–Apr 28 (sow outdoors) | Sep 10–24 (sowing) |
| Turnip | – | Mar 24–Apr 14 (sow outdoors) | Aug 13–27 (sowing) |
| Parsnip | – | Mar 31–Apr 21 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Feb 24–Mar 24 (sow outdoors) | Jul 30–Aug 13 (sowing) |
| Onion (bulbing) | Jan 27–Feb 10 | Mar 10–24 (transplant) | – |
| Green onion / scallion | – | Mar 10–Apr 7 (sow outdoors) | Aug 13–27 (sowing) |
| Leek | Jan 27–Feb 10 | Mar 24–Apr 7 (transplant) | – |
| Garlic | – | – | Sep 10–Oct 8 (sowing) |
| Shallot | – | Mar 10–24 (transplant) | Sep 10–Oct 8 (sowing) |
| Potato | – | Mar 24–Apr 7 (transplant) | Jul 2–16 (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 27–Sep 10 (sowing) |
| Parsley | Feb 10–24 | Apr 7–21 (transplant) Mar 31–Apr 21 (sow outdoors) | – |
| Dill | – | Apr 21–May 5 (sow outdoors) | Aug 27–Sep 10 (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 13–Sep 10 (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: Boston 4 SE, VA (NOAA GHCN-Daily ID USC00440860), elevation 590 ft, 6.1 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Sperryville, VA | 13 mi | Apr 16 | Oct 27 |
| Warrenton 3 SE, VA | 14 mi | Apr 9 | Nov 1 |
| Luray 5 E, VA | 21 mi | Apr 23 | Oct 22 |
The average last-frost dates of these stations span 14 days, a rough guide to local variation. See data sources & methods.
Frost questions for 22737
When is the last frost in 22737?
The average (50% chance) last spring freeze of 32°F for ZIP 22737 is April 21. For a more cautious planting date, use May 10, when only 1 year in 10 still sees a later freeze.
When is the first frost in 22737?
The average first fall freeze is October 22. In 1 year in 10 it comes by October 8.
What hardiness zone is 22737?
ZIP 22737 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 22737 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
22746 22724 22716 20106 22714 Brandy Station 22713 22749 20186 Warrenton
Other ZIP codes in Culpeper County
22701 22713 22714 22718 22724 22726 22729 22733 22736 22741 22746 All Culpeper County frost dates · Virginia frost dates
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