Fall in zone 6bPhoto: Dietmar Rabich, CC BY-SA 4.0, via Wikimedia Commons
Frost dates for ZIP 66015 (Colony, 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, Iola 1 W, KS (11 miles away).
- Average last spring frostApr 850% chance of a 32°F freeze after this date
- Average first fall frostOct 2650% chance of a 32°F freeze by this date
- Growing season (frost-free)200 daysmedian, 32°F threshold
- USDA hardiness zone6b-5 to 0°F avg. coldest night
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Frost and freeze alerts from the NWS forecast for 66015, the spring soil-temperature heads-up for pre-emergent, and a short weekly yard-timing email.
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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
No soil station with a fresh reading within 62 miles.
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 66015 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 May 24 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 26: 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 25 |
| 50% (the "average" last frost) | Apr 8 |
| 10% (cautious: only 1 year in 10 freezes later) | Apr 24 |
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 13 |
| 50% (the "average" first frost) | Oct 26 |
| 90% (late: most years have frozen by now) | Nov 7 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Apr 20 | Oct 18 |
| 32°F (freeze) | Apr 8 | Oct 26 |
| 28°F (hard freeze) | Mar 30 | Nov 4 |
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 66015
Dates count from your average last spring frost (Apr 8) and first fall frost (Oct 26). 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 11–25 | Apr 15–29 (transplant) | – |
| Pepper (sweet and hot) | Jan 28–Feb 11 | Apr 22–May 6 (transplant) | – |
| Eggplant | Jan 28–Feb 11 | Apr 22–May 6 (transplant) | – |
| Tomatillo | Feb 11–25 | Apr 15–29 (transplant) | – |
| Lettuce | Feb 11–25 | Mar 18–Apr 8 (transplant) Mar 11–Apr 22 (sow outdoors) | Aug 31–Sep 21 (transplant) Aug 17–Sep 14 (sowing) |
| Spinach | – | Feb 25–Mar 18 (sow outdoors) | Aug 31–Sep 21 (sowing) |
| Kale | Feb 11–25 | Mar 11–25 (transplant) Mar 11–25 (sow outdoors) | Aug 3–31 (transplant) Jul 20–Aug 17 (sowing) |
| Collards | Feb 11–25 | Mar 11–Apr 8 (transplant) Mar 11–Apr 8 (sow outdoors) | Aug 3–31 (transplant) Jul 20–Aug 17 (sowing) |
| Broccoli | Jan 28–Feb 11 | Mar 11–25 (transplant) | Jul 20–Aug 17 (transplant) |
| Cabbage | Jan 28–Feb 11 | Mar 11–25 (transplant) | Jul 20–Aug 17 (transplant) |
| Cauliflower | Jan 28–Feb 11 | Mar 25–Apr 8 (transplant) | Jul 20–Aug 17 (transplant) |
| Brussels sprouts | Jan 14–28 | Mar 11–25 (transplant) | Jul 6–27 (transplant) |
| Kohlrabi | Feb 11–25 | Mar 11–25 (transplant) Mar 11–25 (sow outdoors) | Aug 17–31 (sowing) |
| Bok choy / Asian greens | – | Mar 11–25 (sow outdoors) | Aug 31–Sep 14 (sowing) |
| Arugula | – | Mar 11–Apr 8 (sow outdoors) | Aug 31–Sep 28 (sowing) |
| Mustard greens | – | Mar 11–Apr 1 (sow outdoors) | Aug 31–Sep 14 (sowing) |
| Swiss chard | Feb 25–Mar 11 | Mar 25–Apr 15 (transplant) Mar 25–Apr 22 (sow outdoors) | Aug 17–31 (sowing) |
| Beet | – | Mar 11–Apr 8 (sow outdoors) | Aug 17–31 (sowing) |
| Carrot | – | Mar 18–Apr 15 (sow outdoors) | Aug 3–17 (sowing) |
| Radish | – | Mar 4–Apr 15 (sow outdoors) | Sep 14–28 (sowing) |
| Turnip | – | Mar 11–Apr 1 (sow outdoors) | Aug 17–31 (sowing) |
| Parsnip | – | Mar 18–Apr 8 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Feb 11–Mar 11 (sow outdoors) | Aug 3–17 (sowing) |
| Onion (bulbing) | Jan 14–28 | Feb 25–Mar 11 (transplant) | – |
| Green onion / scallion | – | Feb 25–Mar 25 (sow outdoors) | Aug 17–31 (sowing) |
| Leek | Jan 14–28 | Mar 11–25 (transplant) | – |
| Garlic | – | – | Sep 14–Oct 12 (sowing) |
| Shallot | – | Feb 25–Mar 11 (transplant) | Sep 14–Oct 12 (sowing) |
| Potato | – | Mar 11–25 (transplant) | Jul 6–20 (transplant) |
| Sweet potato | – | Apr 29–May 13 (transplant) | – |
| Sweet corn | – | Apr 15–29 (sow outdoors) | – |
| Bean, bush (snap) | – | Apr 15–29 (sow outdoors) | – |
| Bean, pole | – | Apr 15–29 (sow outdoors) | – |
| Lima bean | – | Apr 22–May 6 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Apr 29–May 20 (sow outdoors) | – |
| Cucumber | Mar 11–18 | Apr 15–29 (transplant) Apr 15–29 (sow outdoors) | – |
| Summer squash / zucchini | Mar 11–18 | Apr 15–29 (transplant) Apr 15–29 (sow outdoors) | – |
| Winter squash | Mar 11–18 | Apr 15–29 (transplant) Apr 15–29 (sow outdoors) | – |
| Pumpkin | – | Apr 15–29 (sow outdoors) | – |
| Watermelon | Mar 11–18 | Apr 22–May 6 (transplant) Apr 22–May 6 (sow outdoors) | – |
| Cantaloupe / muskmelon | Mar 11–18 | Apr 22–May 6 (transplant) Apr 22–May 6 (sow outdoors) | – |
| Okra | Feb 25–Mar 11 | Apr 22–May 6 (transplant) Apr 22–May 6 (sow outdoors) | – |
| Celery | Jan 14–28 | Apr 15–22 (transplant) | – |
| Basil | Feb 25–Mar 11 | Apr 15–29 (transplant) Apr 15–29 (sow outdoors) | – |
| Cilantro | – | Mar 25–Apr 22 (sow outdoors) | Aug 31–Sep 14 (sowing) |
| Parsley | Jan 28–Feb 11 | Mar 25–Apr 8 (transplant) Mar 18–Apr 8 (sow outdoors) | – |
| Dill | – | Apr 8–22 (sow outdoors) | Aug 31–Sep 14 (sowing) |
| Sunflower | – | Apr 8–22 (sow outdoors) | – |
| Asparagus (crowns) | – | Mar 11–25 (transplant) | – |
| Rhubarb (crowns) | – | Mar 11–25 (transplant) | – |
| Strawberry (plants) | – | Mar 11–25 (transplant) | Aug 17–Sep 14 (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 8 here (the average last frost). Not affiliated with the program.
Where these numbers come from
Station: Iola 1 W, KS (NOAA GHCN-Daily ID USC00143984), elevation 954 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%) |
|---|---|---|---|
| Garnett 1 E, KS | 17 mi | Apr 17 | Oct 22 |
| Humboldt, KS | 18 mi | Apr 11 | Oct 27 |
| Yates Ctr, KS | 22 mi | Apr 10 | Oct 28 |
The average last-frost dates of these stations span 9 days, a rough guide to local variation. See data sources & methods.
Frost questions for 66015
When is the last frost in 66015?
The average (50% chance) last spring freeze of 32°F for ZIP 66015 is April 8. For a more cautious planting date, use April 24, when only 1 year in 10 still sees a later freeze.
When is the first frost in 66015?
The average first fall freeze is October 26. In 1 year in 10 it comes by October 13.
What hardiness zone is 66015?
ZIP 66015 is in USDA zone 6b (-5 to 0°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 66015 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
66091 Welda 66749 Iola 66093 Westphalia 66758 Neosho Falls 66742 Gas 66751 La Harpe 66857 LeRoy 66039 Kincaid
Other ZIP codes in Anderson County
66032 66033 66039 66091 66093 All Anderson County frost dates · Kansas 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.