Fall in zone 8bPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 97410 (Douglas County, OR)
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, Riddle, OR (16 miles away).
- Average last spring frostMar 3150% chance of a 32°F freeze after this date
- Average first fall frostNov 650% chance of a 32°F freeze by this date
- Growing season (frost-free)221 daysmedian, 32°F threshold
- USDA hardiness zone8b15 to 20°F avg. coldest night
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Frost and freeze alerts from the NWS forecast for 97410, 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 97410 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 March to April.
Fertilizer window
Lawn region: Pacific Northwest (west of the Cascades). Timing only; always follow the product label.
- Perennial ryegrass (cool-season): Early fall: September; Late fall: October–November; Overseeded Bermuda: Light feeding once the winter rye is established, if needed. Avoid: Summer feeding.
Plant now
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Nov 6: 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) | Feb 27 |
| 50% (the "average" last frost) | Mar 31 |
| 10% (cautious: only 1 year in 10 freezes later) | Apr 27 |
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) | Nov 6 |
| 90% (late: most years have frozen by now) | Dec 13 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Apr 27 | Oct 14 |
| 32°F (freeze) | Mar 31 | Nov 6 |
| 28°F (hard freeze) | Feb 20 | Dec 10 |
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 97410
Dates count from your average last spring frost (Mar 31) and first fall frost (Nov 6). 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 3–17 | Apr 7–21 (transplant) | Jul 10–Aug 7 (transplant) |
| Pepper (sweet and hot) | Jan 20–Feb 3 | Apr 14–28 (transplant) | Jul 17–Aug 7 (transplant) |
| Eggplant | Jan 20–Feb 3 | Apr 14–28 (transplant) | Jul 17–Aug 7 (transplant) |
| Tomatillo | Feb 3–17 | Apr 7–21 (transplant) | – |
| Lettuce | Feb 3–17 | Mar 10–31 (transplant) Mar 3–Apr 14 (sow outdoors) | Sep 11–Oct 2 (transplant) Aug 28–Sep 25 (sowing) |
| Spinach | – | Feb 17–Mar 10 (sow outdoors) | Sep 11–Oct 2 (sowing) |
| Kale | Feb 3–17 | Mar 3–17 (transplant) Mar 3–17 (sow outdoors) | Aug 14–Sep 11 (transplant) Jul 31–Aug 28 (sowing) |
| Collards | Feb 3–17 | Mar 3–31 (transplant) Mar 3–31 (sow outdoors) | Aug 14–Sep 11 (transplant) Jul 31–Aug 28 (sowing) |
| Broccoli | Jan 20–Feb 3 | Mar 3–17 (transplant) | Jul 31–Aug 28 (transplant) |
| Cabbage | Jan 20–Feb 3 | Mar 3–17 (transplant) | Jul 31–Aug 28 (transplant) |
| Cauliflower | Jan 20–Feb 3 | Mar 17–31 (transplant) | Jul 31–Aug 28 (transplant) |
| Brussels sprouts | Jan 6–20 | Mar 3–17 (transplant) | Jul 17–Aug 7 (transplant) |
| Kohlrabi | Feb 3–17 | Mar 3–17 (transplant) Mar 3–17 (sow outdoors) | Aug 28–Sep 11 (sowing) |
| Bok choy / Asian greens | – | Mar 3–17 (sow outdoors) | Sep 11–25 (sowing) |
| Arugula | – | Mar 3–31 (sow outdoors) | Sep 11–Oct 9 (sowing) |
| Mustard greens | – | Mar 3–24 (sow outdoors) | Sep 11–25 (sowing) |
| Swiss chard | Feb 17–Mar 3 | Mar 17–Apr 7 (transplant) Mar 17–Apr 14 (sow outdoors) | Aug 28–Sep 11 (sowing) |
| Beet | – | Mar 3–31 (sow outdoors) | Aug 28–Sep 11 (sowing) |
| Carrot | – | Mar 10–Apr 7 (sow outdoors) | Aug 14–28 (sowing) |
| Radish | – | Feb 24–Apr 7 (sow outdoors) | Sep 25–Oct 9 (sowing) |
| Turnip | – | Mar 3–24 (sow outdoors) | Aug 28–Sep 11 (sowing) |
| Parsnip | – | Mar 10–31 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Feb 3–Mar 3 (sow outdoors) | Aug 14–28 (sowing) |
| Onion (bulbing) | Jan 6–20 | Feb 17–Mar 3 (transplant) | – |
| Green onion / scallion | – | Feb 17–Mar 17 (sow outdoors) | Aug 28–Sep 11 (sowing) |
| Leek | Jan 6–20 | Mar 3–17 (transplant) | – |
| Garlic | – | – | Sep 25–Oct 23 (sowing) |
| Shallot | – | Feb 17–Mar 3 (transplant) | Sep 25–Oct 23 (sowing) |
| Potato | – | Mar 3–17 (transplant) | Jul 17–31 (transplant) |
| Sweet potato | – | Apr 21–May 5 (transplant) | – |
| Sweet corn | – | Apr 7–21 (sow outdoors) | – |
| Bean, bush (snap) | – | Apr 7–21 (sow outdoors) | Aug 14–28 (sowing) |
| Bean, pole | – | Apr 7–21 (sow outdoors) | – |
| Lima bean | – | Apr 14–28 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Apr 21–May 12 (sow outdoors) | – |
| Cucumber | Mar 3–10 | Apr 7–21 (transplant) Apr 7–21 (sow outdoors) | Aug 14–28 (sowing) |
| Summer squash / zucchini | Mar 3–10 | Apr 7–21 (transplant) Apr 7–21 (sow outdoors) | Aug 14–28 (sowing) |
| Winter squash | Mar 3–10 | Apr 7–21 (transplant) Apr 7–21 (sow outdoors) | – |
| Pumpkin | – | Apr 7–21 (sow outdoors) | – |
| Watermelon | Mar 3–10 | Apr 14–28 (transplant) Apr 14–28 (sow outdoors) | – |
| Cantaloupe / muskmelon | Mar 3–10 | Apr 14–28 (transplant) Apr 14–28 (sow outdoors) | – |
| Okra | Feb 17–Mar 3 | Apr 14–28 (transplant) Apr 14–28 (sow outdoors) | – |
| Celery | Jan 6–20 | Apr 7–14 (transplant) | – |
| Basil | Feb 17–Mar 3 | Apr 7–21 (transplant) Apr 7–21 (sow outdoors) | – |
| Cilantro | – | Mar 17–Apr 14 (sow outdoors) | Sep 11–25 (sowing) |
| Parsley | Jan 20–Feb 3 | Mar 17–31 (transplant) Mar 10–31 (sow outdoors) | – |
| Dill | – | Mar 31–Apr 14 (sow outdoors) | Sep 11–25 (sowing) |
| Sunflower | – | Mar 31–Apr 14 (sow outdoors) | – |
| Asparagus (crowns) | – | Mar 3–17 (transplant) | – |
| Rhubarb (crowns) | – | Mar 3–17 (transplant) | – |
| Strawberry (plants) | – | Mar 3–17 (transplant) | Aug 28–Sep 25 (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: Riddle, OR (NOAA GHCN-Daily ID USC00357169), elevation 680 ft, 15.8 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Sexton Summit, OR | 19 mi | May 16 | Oct 30 |
| Lost Creek Dam, OR | 24 mi | Apr 29 | Oct 17 |
| Grants Pass, OR | 28 mi | Apr 8 | Oct 28 |
The average last-frost dates of these stations span 47 days, a rough guide to local variation. See data sources & methods.
Frost questions for 97410
When is the last frost in 97410?
The average (50% chance) last spring freeze of 32°F for ZIP 97410 is March 31. For a more cautious planting date, use April 27, when only 1 year in 10 still sees a later freeze.
When is the first frost in 97410?
The average first fall freeze is November 6. In 1 year in 10 it comes by October 11.
What hardiness zone is 97410?
ZIP 97410 is in USDA zone 8b (15 to 20°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.
What is the soil temperature in 97410 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
97417 Days Creek 97429 97442 Glendale 97484 97503 White City 97537 Wimer 97469 Riddle 97497
Other ZIP codes in Douglas County
97416 97417 97429 97432 97435 97436 97441 97442 97443 97447 97457 97462 97467 97469 97470 97471 97473 97479 97481 97484 97486 97494 97495 97496 All Douglas County frost dates · Oregon frost dates
Never miss a frost: get The Dial
Weekly yard timing, plus frost and soil-temperature alerts for your ZIP code.
- Freeze alerts
- Soil-temp heads-up
- Weekly yard to-dos
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.