Fall in zone 8bPhoto: George Chernilevsky, Public domain, via Wikimedia Commons
Frost dates for ZIP 97009 (Boring, 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, Headworks Portland Wtr B, OR (9 miles away).
- Average last spring frostMar 2750% chance of a 32°F freeze after this date
- Average first fall frostNov 1850% chance of a 32°F freeze by this date
- Growing season (frost-free)239 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 97009, 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 97009 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
- Arugula: fall sowing Sep 23–Oct 21
- Radish: fall sowing Oct 7–21
- Garlic: fall sowing Oct 7–Nov 4
- Shallot: fall sowing Oct 7–Nov 4
Prune now
No frost-timed pruning windows are open this week.
Your average first frost is Nov 18: 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 26 |
| 50% (the "average" last frost) | Mar 27 |
| 10% (cautious: only 1 year in 10 freezes later) | Apr 20 |
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 26 |
| 50% (the "average" first frost) | Nov 18 |
| 90% (late: most years have frozen by now) | Dec 10 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Apr 26 | Oct 29 |
| 32°F (freeze) | Mar 27 | Nov 18 |
| 28°F (hard freeze) | Feb 14 | Dec 9 |
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 97009
Dates count from your average last spring frost (Mar 27) and first fall frost (Nov 18). 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 | Jan 30–Feb 13 | Apr 3–17 (transplant) | Jul 22–Aug 19 (transplant) |
| Pepper (sweet and hot) | Jan 16–30 | Apr 10–24 (transplant) | Jul 29–Aug 19 (transplant) |
| Eggplant | Jan 16–30 | Apr 10–24 (transplant) | Jul 29–Aug 19 (transplant) |
| Tomatillo | Jan 30–Feb 13 | Apr 3–17 (transplant) | – |
| Lettuce | Jan 30–Feb 13 | Mar 6–27 (transplant) Feb 27–Apr 10 (sow outdoors) | Sep 23–Oct 14 (transplant) Sep 9–Oct 7 (sowing) |
| Spinach | – | Feb 13–Mar 6 (sow outdoors) | Sep 23–Oct 14 (sowing) |
| Kale | Jan 30–Feb 13 | Feb 27–Mar 13 (transplant) Feb 27–Mar 13 (sow outdoors) | Aug 26–Sep 23 (transplant) Aug 12–Sep 9 (sowing) |
| Collards | Jan 30–Feb 13 | Feb 27–Mar 27 (transplant) Feb 27–Mar 27 (sow outdoors) | Aug 26–Sep 23 (transplant) Aug 12–Sep 9 (sowing) |
| Broccoli | Jan 16–30 | Feb 27–Mar 13 (transplant) | Aug 12–Sep 9 (transplant) |
| Cabbage | Jan 16–30 | Feb 27–Mar 13 (transplant) | Aug 12–Sep 9 (transplant) |
| Cauliflower | Jan 16–30 | Mar 13–27 (transplant) | Aug 12–Sep 9 (transplant) |
| Brussels sprouts | Jan 2–16 | Feb 27–Mar 13 (transplant) | Jul 29–Aug 19 (transplant) |
| Kohlrabi | Jan 30–Feb 13 | Feb 27–Mar 13 (transplant) Feb 27–Mar 13 (sow outdoors) | Sep 9–23 (sowing) |
| Bok choy / Asian greens | – | Feb 27–Mar 13 (sow outdoors) | Sep 23–Oct 7 (sowing) |
| Arugula | – | Feb 27–Mar 27 (sow outdoors) | Sep 23–Oct 21 (sowing) |
| Mustard greens | – | Feb 27–Mar 20 (sow outdoors) | Sep 23–Oct 7 (sowing) |
| Swiss chard | Feb 13–27 | Mar 13–Apr 3 (transplant) Mar 13–Apr 10 (sow outdoors) | Sep 9–23 (sowing) |
| Beet | – | Feb 27–Mar 27 (sow outdoors) | Sep 9–23 (sowing) |
| Carrot | – | Mar 6–Apr 3 (sow outdoors) | Aug 26–Sep 9 (sowing) |
| Radish | – | Feb 20–Apr 3 (sow outdoors) | Oct 7–21 (sowing) |
| Turnip | – | Feb 27–Mar 20 (sow outdoors) | Sep 9–23 (sowing) |
| Parsnip | – | Mar 6–27 (sow outdoors) | – |
| Pea (garden, snap, snow) | – | Jan 30–Feb 27 (sow outdoors) | Aug 26–Sep 9 (sowing) |
| Onion (bulbing) | Jan 2–16 | Feb 13–27 (transplant) | – |
| Green onion / scallion | – | Feb 13–Mar 13 (sow outdoors) | Sep 9–23 (sowing) |
| Leek | Jan 2–16 | Feb 27–Mar 13 (transplant) | – |
| Garlic | – | – | Oct 7–Nov 4 (sowing) |
| Shallot | – | Feb 13–27 (transplant) | Oct 7–Nov 4 (sowing) |
| Potato | – | Feb 27–Mar 13 (transplant) | Jul 29–Aug 12 (transplant) |
| Sweet potato | – | Apr 17–May 1 (transplant) | – |
| Sweet corn | – | Apr 3–17 (sow outdoors) | – |
| Bean, bush (snap) | – | Apr 3–17 (sow outdoors) | Aug 26–Sep 9 (sowing) |
| Bean, pole | – | Apr 3–17 (sow outdoors) | – |
| Lima bean | – | Apr 10–24 (sow outdoors) | – |
| Southern pea (cowpea, black-eyed pea) | – | Apr 17–May 8 (sow outdoors) | – |
| Cucumber | Feb 27–Mar 6 | Apr 3–17 (transplant) Apr 3–17 (sow outdoors) | Aug 26–Sep 9 (sowing) |
| Summer squash / zucchini | Feb 27–Mar 6 | Apr 3–17 (transplant) Apr 3–17 (sow outdoors) | Aug 26–Sep 9 (sowing) |
| Winter squash | Feb 27–Mar 6 | Apr 3–17 (transplant) Apr 3–17 (sow outdoors) | – |
| Pumpkin | – | Apr 3–17 (sow outdoors) | – |
| Watermelon | Feb 27–Mar 6 | Apr 10–24 (transplant) Apr 10–24 (sow outdoors) | – |
| Cantaloupe / muskmelon | Feb 27–Mar 6 | Apr 10–24 (transplant) Apr 10–24 (sow outdoors) | – |
| Okra | Feb 13–27 | Apr 10–24 (transplant) Apr 10–24 (sow outdoors) | – |
| Celery | Jan 2–16 | Apr 3–10 (transplant) | – |
| Basil | Feb 13–27 | Apr 3–17 (transplant) Apr 3–17 (sow outdoors) | – |
| Cilantro | – | Mar 13–Apr 10 (sow outdoors) | Sep 23–Oct 7 (sowing) |
| Parsley | Jan 16–30 | Mar 13–27 (transplant) Mar 6–27 (sow outdoors) | – |
| Dill | – | Mar 27–Apr 10 (sow outdoors) | Sep 23–Oct 7 (sowing) |
| Sunflower | – | Mar 27–Apr 10 (sow outdoors) | – |
| Asparagus (crowns) | – | Feb 27–Mar 13 (transplant) | – |
| Rhubarb (crowns) | – | Feb 27–Mar 13 (transplant) | – |
| Strawberry (plants) | – | Feb 27–Mar 13 (transplant) | Sep 9–Oct 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.
Where these numbers come from
Station: Headworks Portland Wtr B, OR (NOAA GHCN-Daily ID USC00353770), elevation 748 ft, 8.8 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Troutdale, OR | 9 mi | Mar 26 | Nov 17 |
| Portland Troutdale AP, OR | 10 mi | Mar 16 | Nov 20 |
| Estacada 2 SE, OR | 11 mi | Mar 27 | Nov 14 |
The average last-frost dates of these stations span 11 days, a rough guide to local variation. See data sources & methods.
Frost questions for 97009
When is the last frost in 97009?
The average (50% chance) last spring freeze of 32°F for ZIP 97009 is March 27. For a more cautious planting date, use April 20, when only 1 year in 10 still sees a later freeze.
When is the first frost in 97009?
The average first fall freeze is November 18. In 1 year in 10 it comes by October 26.
What hardiness zone is 97009?
ZIP 97009 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 97009 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
97080 Gresham 97022 97089 Damascus 97060 Troutdale 97030 Gresham 97019 97055 Sandy 97086 Happy Valley
Other ZIP codes in Clackamas County
97004 97011 97013 97015 97017 97022 97023 97027 97028 97034 97035 97038 97042 97045 97049 97055 97067 97068 97070 97086 97089 97222 97267 All Clackamas County frost dates · Oregon frost dates
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Weekly yard timing, plus frost and soil-temperature alerts for your ZIP code.
- 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.