Woodburn, OR frost dates
Last spring frostMar 16median date
First fall frostNov 14median date
Growing season243 daysfrost-free
Hardiness zone8bZone 8b
How Woodburn compares
- In 8 years out of 10, the last spring frost in Woodburn falls between February 21 and April 7, a 45-day window. The first fall frost falls between October 27 and December 6.
- The median last frost is 31 days earlier than the Oregon median of Apr 16.
- Its 243-day growing season is longer than 83% of the 345 Oregon places with a regular frost season (state median 193 days).
- The last frost is typical for zone 8b, where the median is Mar 16.
- The weather station records an average of 39 nights a year at or below 32°F.
- Compared with Salem, OR, 25 km away, the last frost here is 18 days earlier than there and the growing season is 31 days longer.
Frost probability
| Chance of frost after | Date |
|---|---|
| 90% (early) | February 21 |
| 50% (median) | March 16 |
| 10% (safe for tender plants) | April 7 |
| Chance of frost before | Date |
|---|---|
| 10% (early) | October 27 |
| 50% (median) | November 14 |
| 90% (late) | December 6 |
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 Woodburn, OR
Woodburn, OR frost dates — last frost Mar 16, first frost Nov 14, zone 8b. whenisthelastfrost.com
Crop
JFMAMJJASOND
Start indoors: Dec 22 to Jan 5Start indoors: Dec 22 to Jan 5Transplant outside: Feb 16 to Mar 2
Start indoors: Jan 5 to Jan 19Transplant outside: Mar 30 to Apr 13
Start indoors: Jan 5 to Jan 19Transplant outside: Mar 30 to Apr 13
Start indoors: Jan 19 to Feb 2Transplant outside: Mar 23 to Apr 6
Start indoors: Jan 19 to Feb 2Transplant outside: Feb 23 to Mar 9Sow outdoors: Feb 16 to Mar 23Plant for fall: Sep 19 to Oct 17
Start indoors: Jan 19 to Feb 2Transplant outside: Feb 16 to Mar 2Sow outdoors: Feb 16 to Mar 2Plant for fall: Sep 5 to Sep 26
Start indoors: Jan 19 to Feb 2Transplant outside: Mar 2 to Mar 16Plant for fall: Aug 8 to Aug 29
Start indoors: Jan 19 to Feb 2Transplant outside: Feb 23 to Mar 9Plant for fall: Aug 8 to Aug 29
Start indoors: Jan 19 to Feb 2Transplant outside: Mar 2 to Mar 16Plant for fall: Aug 8 to Aug 29
Start indoors: Feb 2 to Feb 16Transplant outside: Apr 6 to Apr 20Sow outdoors: Apr 6 to Apr 20
Start indoors: Feb 2 to Feb 16Transplant outside: Mar 23 to Apr 6
Sow outdoors: Feb 2 to Feb 23Plant for fall: Aug 22 to Sep 12
Sow outdoors: Feb 2 to Feb 23Plant for fall: Sep 19 to Oct 10
Sow outdoors: Feb 9 to Mar 23Plant for fall: Oct 3 to Oct 24
Start indoors: Feb 16 to Feb 23Transplant outside: Mar 30 to Apr 6Sow outdoors: Mar 23 to Apr 6Plant for fall: Aug 29 to Sep 12
Start indoors: Feb 16 to Feb 23Sow outdoors: Mar 23 to Apr 6Plant for fall: Sep 5 to Sep 19
Start indoors: Feb 16 to Feb 23Sow outdoors: Mar 23 to Apr 6
Start indoors: Feb 16 to Feb 23Transplant outside: Mar 30 to Apr 13
Sow outdoors: Feb 23 to Mar 23Plant for fall: Aug 22 to Sep 5
Sow outdoors: Feb 23 to Mar 23Plant for fall: Sep 5 to Sep 19
Sow outdoors: Feb 23 to Mar 16
Sow outdoors: Mar 2 to Mar 30Plant for fall: Sep 5 to Sep 19
Sow outdoors: Mar 2 to Mar 23Plant for fall: Sep 19 to Oct 10
Sow outdoors: Mar 23 to Apr 13Plant for fall: Aug 29 to Sep 12
Sow outdoors: Mar 23 to Apr 6
Transplant outside: Mar 30 to Apr 20
Plant for fall: Oct 31 to Dec 5
Start indoorsTransplant outsideSow outdoorsPlant for fallMedian frost dates
When to plant vegetables in Woodburn, OR
| Crop | Start indoors | Transplant | Sow outdoors | Fall crop |
|---|---|---|---|---|
| Onions | Dec 22 – Jan 5 | Feb 16 – Mar 2 | — | — |
| Peppers | Jan 5 – Jan 19 | Mar 30 – Apr 13 | — | — |
| Eggplant | Jan 5 – Jan 19 | Mar 30 – Apr 13 | — | — |
| Tomatoes | Jan 19 – Feb 2 | Mar 23 – Apr 6 | — | — |
| Lettuce | Jan 19 – Feb 2 | Feb 23 – Mar 9 | Feb 16 – Mar 23 | Sep 19 – Oct 17 |
| Kale | Jan 19 – Feb 2 | Feb 16 – Mar 2 | Feb 16 – Mar 2 | Sep 5 – Sep 26 |
| Broccoli | Jan 19 – Feb 2 | Mar 2 – Mar 16 | — | Aug 8 – Aug 29 |
| Cabbage | Jan 19 – Feb 2 | Feb 23 – Mar 9 | — | Aug 8 – Aug 29 |
| Cauliflower | Jan 19 – Feb 2 | Mar 2 – Mar 16 | — | Aug 8 – Aug 29 |
| Okra | Feb 2 – Feb 16 | Apr 6 – Apr 20 | Apr 6 – Apr 20 | — |
| Basil | Feb 2 – Feb 16 | Mar 23 – Apr 6 | — | — |
| Peas | — | — | Feb 2 – Feb 23 | Aug 22 – Sep 12 |
| Spinach | — | — | Feb 2 – Feb 23 | Sep 19 – Oct 10 |
| Radishes | — | — | Feb 9 – Mar 23 | Oct 3 – Oct 24 |
| Cucumbers | Feb 16 – Feb 23 | Mar 30 – Apr 6 | Mar 23 – Apr 6 | Aug 29 – Sep 12 |
| Zucchini & Summer Squash | Feb 16 – Feb 23 | — | Mar 23 – Apr 6 | Sep 5 – Sep 19 |
| Winter Squash & Pumpkins | Feb 16 – Feb 23 | — | Mar 23 – Apr 6 | — |
| Melons & Watermelon | Feb 16 – Feb 23 | Mar 30 – Apr 13 | — | — |
| Carrots | — | — | Feb 23 – Mar 23 | Aug 22 – Sep 5 |
| Beets | — | — | Feb 23 – Mar 23 | Sep 5 – Sep 19 |
| Potatoes | — | — | Feb 23 – Mar 16 | — |
| Swiss Chard | — | — | Mar 2 – Mar 30 | Sep 5 – Sep 19 |
| Cilantro | — | — | Mar 2 – Mar 23 | Sep 19 – Oct 10 |
| Green Beans | — | — | Mar 23 – Apr 13 | Aug 29 – Sep 12 |
| Sweet Corn | — | — | Mar 23 – Apr 6 | — |
| Sweet Potatoes | — | Mar 30 – Apr 20 | — | — |
| Garlic | — | — | — | Oct 31 – Dec 5 |
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 Aurora State Ap, OR weather station, 13 km away (elevation 197 ft (60 m)).
Frost dates near Woodburn
- Gervais Mar 28 · Nov 10
- Hubbard Mar 16 · Nov 14
- Donald Mar 16 · Nov 14
- Mount Angel Mar 28 · Nov 10
- Aurora Mar 16 · Nov 14
- Saint Paul Mar 21 · Nov 22
- Dayton Apr 15 · Oct 26
- Canby Mar 18 · Nov 13
- Wilsonville Mar 18 · Nov 13
- Silverton Mar 28 · Nov 10
Frequently asked questions
When is the last frost in Woodburn, OR?
The median last spring frost in Woodburn, OR is March 16. There is still about a 10% chance of frost after April 7, so wait until then to plant frost-tender crops like tomatoes and peppers.
When is the first frost in Woodburn, OR?
The median first fall frost is November 14, with about a 10% chance of frost before October 27.
How long is the growing season in Woodburn, OR?
About 243 days between the median last spring frost and first fall frost.
What planting zone is Woodburn, OR?
Woodburn, OR is in USDA hardiness zone 8b.