Frost dates for ZIP 66087 (Troy, KS)
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, Troy 3N, KS (3 miles away).
- Average last spring frostApr 1950% chance of a 32°F freeze after this date
- Average first fall frostOct 1950% chance of a 32°F freeze by this date
- Growing season (frost-free)182 daysmedian, 32°F threshold
- USDA hardiness zone6a-10 to -5°F avg. coldest night
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This week in your yard
As of Oct 17, 2026, from your frost dates, zone and soil temperature. Lawn timing · Vegetables · Pruning · Plants
Soil temperature now
2-inch depth
55°F 55°F or warmer
24-hour average · latest 56°F, as of Oct 17, 10:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Ku-Nesa (52 mi), Centralia Lake (55 mi).
4-inch depth
60°F 55°F or warmer
24-hour average · latest 61°F, as of Oct 17, 10:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Ku-Nesa (52 mi), Centralia Lake (55 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 66087 load here. You can also open the NWS forecast for this ZIP.
Pre-emergent
Soil is 60°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 4 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 19: 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 19 |
| 10% (cautious: only 1 year in 10 freezes later) | May 5 |
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 2 |
| 50% (the "average" first frost) | Oct 19 |
| 90% (late: most years have frozen by now) | Nov 1 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Apr 29 | Oct 8 |
| 32°F (freeze) | Apr 19 | Oct 19 |
| 28°F (hard freeze) | Apr 8 | Oct 29 |
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 66087
Dates count from your average last spring frost (Apr 19) and first fall frost (Oct 19). 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 22–Mar 8 | Apr 26–May 10 (transplant) | – |
| Pepper (sweet and hot) | Feb 8–22 | May 3–17 (transplant) | – |
| Eggplant | Feb 8–22 | May 3–17 (transplant) | – |
| Tomatillo | Feb 22–Mar 8 | Apr 26–May 10 (transplant) | – |
| Lettuce | Feb 22–Mar 8 | Mar 29–Apr 19 (transplant) Mar 22–May 3 (sow outdoors) | Aug 24–Sep 14 (transplant) Aug 10–Sep 7 (sowing) |
| Spinach | – | Mar 8–29 (sow outdoors) | Aug 24–Sep 14 (sowing) |
| Kale | Feb 22–Mar 8 | Mar 22–Apr 5 (transplant) Mar 22–Apr 5 (sow outdoors) | Jul 27–Aug 24 (transplant) Jul 13–Aug 10 (sowing) |
| Collards | Feb 22–Mar 8 | Mar 22–Apr 19 (transplant) Mar 22–Apr 19 (sow outdoors) | Jul 27–Aug 24 (transplant) Jul 13–Aug 10 (sowing) |
| Broccoli | Feb 8–22 | Mar 22–Apr 5 (transplant) | Jul 13–Aug 10 (transplant) |
| Cabbage | Feb 8–22 | Mar 22–Apr 5 (transplant) | Jul 13–Aug 10 (transplant) |
| Cauliflower | Feb 8–22 | Apr 5–19 (transplant) | Jul 13–Aug 10 (transplant) |
| Brussels sprouts | Jan 25–Feb 8 | Mar 22–Apr 5 (transplant) | Jun 29–Jul 20 (transplant) |
| Kohlrabi | Feb 22–Mar 8 | Mar 22–Apr 5 (transplant) Mar 22–Apr 5 (sow outdoors) | Aug 10–24 (sowing) |
| Bok choy / Asian greens | – | Mar 22–Apr 5 (sow outdoors) | Aug 24–Sep 7 (sowing) |
| Arugula | – | Mar 22–Apr 19 (sow outdoors) | Aug 24–Sep 21 (sowing) |
| Mustard greens | – | Mar 22–Apr 12 (sow outdoors) | Aug 24–Sep 7 (sowing) |
| Swiss chard | Mar 8–22 | Apr 5–26 (transplant) Apr 5–May 3 (sow outdoors) | Aug 10–24 (sowing) |
| Beet | – | Mar 22–Apr 19 (sow outdoors) | Aug 10–24 (sowing) |
| Carrot | – | Mar 29–Apr 26 (sow outdoors) | Jul 27–Aug 10 (sowing) |
| Radish | – | Mar 15–Apr 26 (sow outdoors) | Sep 7–21 (sowing) |
| Turnip | – | Mar 22–Apr 12 (sow outdoors) | Aug 10–24 (sowing) |
| Parsnip | – | Mar 29–Apr 19 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Feb 22–Mar 22 (sow outdoors) | Jul 27–Aug 10 (sowing) |
| Onion (bulbing) | Jan 25–Feb 8 | Mar 8–22 (transplant) | – |
| Green onion / scallion | – | Mar 8–Apr 5 (sow outdoors) | Aug 10–24 (sowing) |
| Leek | Jan 25–Feb 8 | Mar 22–Apr 5 (transplant) | – |
| Garlic | – | – | Sep 7–Oct 5 (sowing) |
| Shallot | – | Mar 8–22 (transplant) | Sep 7–Oct 5 (sowing) |
| Potato | – | Mar 22–Apr 5 (transplant) | Jun 29–Jul 13 (transplant) |
| Sweet potato | – | May 10–24 (transplant) | – |
| Sweet corn | – | Apr 26–May 10 (sow outdoors) | – |
| Bean, bush (snap) | – | Apr 26–May 10 (sow outdoors) | – |
| Bean, pole | – | Apr 26–May 10 (sow outdoors) | – |
| Lima bean | – | May 3–17 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | May 10–31 (sow outdoors) | – |
| Cucumber | Mar 22–29 | Apr 26–May 10 (transplant) Apr 26–May 10 (sow outdoors) | – |
| Summer squash / zucchini | Mar 22–29 | Apr 26–May 10 (transplant) Apr 26–May 10 (sow outdoors) | – |
| Winter squash | Mar 22–29 | Apr 26–May 10 (transplant) Apr 26–May 10 (sow outdoors) | – |
| Pumpkin | – | Apr 26–May 10 (sow outdoors) | – |
| Watermelon | Mar 22–29 | May 3–17 (transplant) May 3–17 (sow outdoors) | – |
| Cantaloupe / muskmelon | Mar 22–29 | May 3–17 (transplant) May 3–17 (sow outdoors) | – |
| Okra | Mar 8–22 | May 3–17 (transplant) May 3–17 (sow outdoors) | – |
| Celery | Jan 25–Feb 8 | Apr 26–May 3 (transplant) | – |
| Basil | Mar 8–22 | Apr 26–May 10 (transplant) Apr 26–May 10 (sow outdoors) | – |
| Cilantro | – | Apr 5–May 3 (sow outdoors) | Aug 24–Sep 7 (sowing) |
| Parsley | Feb 8–22 | Apr 5–19 (transplant) Mar 29–Apr 19 (sow outdoors) | – |
| Dill | – | Apr 19–May 3 (sow outdoors) | Aug 24–Sep 7 (sowing) |
| Sunflower | – | Apr 19–May 3 (sow outdoors) | – |
| Asparagus (crowns) | – | Mar 22–Apr 5 (transplant) | – |
| Rhubarb (crowns) | – | Mar 22–Apr 5 (transplant) | – |
| Strawberry (plants) | – | Mar 22–Apr 5 (transplant) | Aug 10–Sep 7 (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
Kansas has a university or garden plant program: Prairie Star Flowers. Plant frost-tender annuals after April 19 here (the average last frost). Not affiliated with the program.
Where these numbers come from
Station: Troy 3N, KS (NOAA GHCN-Daily ID USC00148250), elevation 1,040 ft, 3.0 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| St Joseph Rosecrans AP, MO | 12 mi | Apr 19 | Oct 17 |
| Oregon, MO | 12 mi | Apr 16 | Oct 20 |
| Atchison, KS | 16 mi | Apr 11 | Oct 29 |
The average last-frost dates of these stations span 8 days, a rough guide to local variation. See data sources & methods.
Frost questions for 66087
When is the last frost in 66087?
The average (50% chance) last spring freeze of 32°F for ZIP 66087 is April 19. For a more cautious planting date, use May 5, when only 1 year in 10 still sees a later freeze.
When is the first frost in 66087?
The average first fall freeze is October 19. In 1 year in 10 it comes by October 2.
What hardiness zone is 66087?
ZIP 66087 is in USDA zone 6a (-10 to -5°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 66087 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
66008 Bendena 66035 Highland 66090 Wathena 66017 Denton 64473 Oregon 66532 Robinson 64421 Amazonia 64451 Forest City
Other ZIP codes in Doniphan County
66008 66017 66024 66035 66090 All Doniphan County frost dates · Kansas frost dates
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