Scappoose, OR frost dates
Last spring frostApr 10median date
First fall frostNov 2median date
Growing season206 daysfrost-free
Hardiness zone8bZone 8b
How Scappoose compares
- In 8 years out of 10, the last spring frost in Scappoose falls between March 17 and May 1, a 45-day window. The first fall frost falls between October 16 and November 23.
- The median last frost is 6 days earlier than the Oregon median of Apr 16.
- Its 206-day growing season is longer than 62% of the 345 Oregon places with a regular frost season (state median 193 days).
- The last frost is 25 days later than the zone 8b median of Mar 16. Hardiness zones measure winter cold, not season length, so use these dates rather than a zone 8b chart.
- The weather station records an average of 61 nights a year at or below 32°F.
- Compared with Vancouver, WA, 25 km away, the last frost here is 16 days earlier than there and the growing season is 31 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | March 17 |
| 50% (median) | April 10 |
| 10% (safe for tender plants) | May 1 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 16 |
| 50% (median) | November 2 |
| 90% (late) | November 23 |
Frost here means 32°F (0°C). A median date means half of years have their last frost earlier and half later.
Planting calendar for Scappoose, OR
Scappoose, OR frost dates — last frost Apr 10, first frost Nov 2, zone 8b. whenisthelastfrost.com
Crop
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Start indoors: Jan 16 to Jan 30Transplant outside: Mar 13 to Mar 27
Start indoors: Jan 30 to Feb 13Transplant outside: Apr 24 to May 8
Start indoors: Jan 30 to Feb 13Transplant outside: Apr 24 to May 8
Start indoors: Feb 13 to Feb 27Transplant outside: Apr 17 to May 1
Start indoors: Feb 13 to Feb 27Transplant outside: Mar 20 to Apr 3Sow outdoors: Mar 13 to Apr 17Plant for fall: Sep 7 to Oct 5
Start indoors: Feb 13 to Feb 27Transplant outside: Mar 13 to Mar 27Sow outdoors: Mar 13 to Mar 27Plant for fall: Aug 24 to Sep 14
Start indoors: Feb 13 to Feb 27Transplant outside: Mar 27 to Apr 10Plant for fall: Jul 27 to Aug 17
Start indoors: Feb 13 to Feb 27Transplant outside: Mar 20 to Apr 3Plant for fall: Jul 27 to Aug 17
Start indoors: Feb 13 to Feb 27Transplant outside: Mar 27 to Apr 10Plant for fall: Jul 27 to Aug 17
Start indoors: Feb 27 to Mar 13Transplant outside: May 1 to May 15Sow outdoors: May 1 to May 15
Start indoors: Feb 27 to Mar 13Transplant outside: Apr 17 to May 1
Sow outdoors: Feb 27 to Mar 20Plant for fall: Aug 10 to Aug 31
Sow outdoors: Feb 27 to Mar 20Plant for fall: Sep 7 to Sep 28
Sow outdoors: Mar 6 to Apr 17Plant for fall: Sep 21 to Oct 12
Start indoors: Mar 13 to Mar 20Transplant outside: Apr 24 to May 1Sow outdoors: Apr 17 to May 1Plant for fall: Aug 17 to Aug 31
Start indoors: Mar 13 to Mar 20Sow outdoors: Apr 17 to May 1Plant for fall: Aug 24 to Sep 7
Start indoors: Mar 13 to Mar 20Sow outdoors: Apr 17 to May 1
Start indoors: Mar 13 to Mar 20Transplant outside: Apr 24 to May 8
Sow outdoors: Mar 20 to Apr 17Plant for fall: Aug 10 to Aug 24
Sow outdoors: Mar 20 to Apr 17Plant for fall: Aug 24 to Sep 7
Sow outdoors: Mar 20 to Apr 10
Sow outdoors: Mar 27 to Apr 24Plant for fall: Aug 24 to Sep 7
Sow outdoors: Mar 27 to Apr 17Plant for fall: Sep 7 to Sep 28
Sow outdoors: Apr 17 to May 8Plant for fall: Aug 17 to Aug 31
Sow outdoors: Apr 17 to May 1
Transplant outside: Apr 24 to May 15
Plant for fall: Oct 19 to Nov 23
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Scappoose, OR
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Jan 16 – Jan 30 | Mar 13 – Mar 27 | — | — |
| Peppers | Jan 30 – Feb 13 | Apr 24 – May 8 | — | — |
| Eggplant | Jan 30 – Feb 13 | Apr 24 – May 8 | — | — |
| Tomatoes | Feb 13 – Feb 27 | Apr 17 – May 1 | — | — |
| Lettuce | Feb 13 – Feb 27 | Mar 20 – Apr 3 | Mar 13 – Apr 17 | Sep 7 – Oct 5 |
| Kale | Feb 13 – Feb 27 | Mar 13 – Mar 27 | Mar 13 – Mar 27 | Aug 24 – Sep 14 |
| Broccoli | Feb 13 – Feb 27 | Mar 27 – Apr 10 | — | Jul 27 – Aug 17 |
| Cabbage | Feb 13 – Feb 27 | Mar 20 – Apr 3 | — | Jul 27 – Aug 17 |
| Cauliflower | Feb 13 – Feb 27 | Mar 27 – Apr 10 | — | Jul 27 – Aug 17 |
| Okra | Feb 27 – Mar 13 | May 1 – May 15 | May 1 – May 15 | — |
| Basil | Feb 27 – Mar 13 | Apr 17 – May 1 | — | — |
| Peas | — | — | Feb 27 – Mar 20 | Aug 10 – Aug 31 |
| Spinach | — | — | Feb 27 – Mar 20 | Sep 7 – Sep 28 |
| Radishes | — | — | Mar 6 – Apr 17 | Sep 21 – Oct 12 |
| Cucumbers | Mar 13 – Mar 20 | Apr 24 – May 1 | Apr 17 – May 1 | Aug 17 – Aug 31 |
| Zucchini & Summer Squash | Mar 13 – Mar 20 | — | Apr 17 – May 1 | Aug 24 – Sep 7 |
| Winter Squash & Pumpkins | Mar 13 – Mar 20 | — | Apr 17 – May 1 | — |
| Melons & Watermelon | Mar 13 – Mar 20 | Apr 24 – May 8 | — | — |
| Carrots | — | — | Mar 20 – Apr 17 | Aug 10 – Aug 24 |
| Beets | — | — | Mar 20 – Apr 17 | Aug 24 – Sep 7 |
| Potatoes | — | — | Mar 20 – Apr 10 | — |
| Swiss Chard | — | — | Mar 27 – Apr 24 | Aug 24 – Sep 7 |
| Cilantro | — | — | Mar 27 – Apr 17 | Sep 7 – Sep 28 |
| Green Beans | — | — | Apr 17 – May 8 | Aug 17 – Aug 31 |
| Sweet Corn | — | — | Apr 17 – May 1 | — |
| Sweet Potatoes | — | Apr 24 – May 15 | — | — |
| Garlic | — | — | — | Oct 19 – Nov 23 |
Dates come from the median frost dates and common extension-service timing. Adjust for your soil temperature, microclimate and the varieties you grow.
About these dates
Based on 1991–2020 NOAA climate normals for the Scappoose Ind Ap, OR weather station, 3 km away (elevation 56 ft (17 m)).
Frost dates near Scappoose
- Warren Apr 18 · Nov 7
- Saint Helens Apr 18 · Nov 7
- North Plains Apr 16 · Oct 23
- Columbia City Apr 18 · Nov 7
- Deer Island Apr 18 · Nov 7
- Banks Apr 16 · Oct 26
- Manning Apr 16 · Oct 26
- Buxton May 8 · Oct 1
- Vernonia May 8 · Oct 1
- Hillsboro Apr 16 · Oct 23
Frequently asked questions
When is the last frost in Scappoose, OR?
The median last spring frost in Scappoose, OR is April 10. There is still about a 10% chance of frost after May 1, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Scappoose, OR?
The median first fall frost is November 2, with about a 10% chance of frost before October 16.
How long is the growing season in Scappoose, OR?
About 206 days between the median last spring frost and first fall frost.
What planting zone is Scappoose, OR?
Scappoose, OR is in USDA hardiness zone 8b.