Frost dates for Woodburn, OR
When the last spring frost and first fall frost usually come, and when to plant, from 30 years of NOAA weather records.
Last spring frost
March 16
typical year
Safe to plant
April 7
frost is over in 9 of 10 years
First fall frost
November 14
typical year
Growing season
242 days
frost-free, typical year
Frost watch this week
Tonight's and the next six nights' lows from the National Weather Service forecast for the station's location. Frost: 32°F or colder. Possible frost: 33–36°F, mostly in low spots on clear, still nights.
When to plant
Counted from this page's frost dates. Warm-season crops wait for the safe-to-plant date.
| Crop | Start indoors | Plant outside | Fall planting |
|---|---|---|---|
| Cool-season crops | |||
| Peas | – | Feb 16 – Mar 2 | – |
| Spinach | – | Feb 2 – 23 | Sep 19 – Oct 3 |
| Lettuce | – | Feb 16 – Mar 9 | Sep 19 – Oct 3 |
| Radishes | – | Feb 16 – Mar 30 | Oct 3 – 17 |
| Onions | – | Feb 16 – Mar 2 | – |
| Potatoes | – | Feb 23 – Mar 9 | – |
| Carrots | – | Feb 23 – Mar 16 | Aug 22 – Sep 5 |
| Beets | – | Feb 16 – Mar 2 | Sep 5 – 19 |
| Kale | Jan 5 – 19 | Feb 16 – Mar 2 | Sep 5 – 19 |
| Broccoli | Jan 5 – 19 | Mar 2 – 16 | Sep 5 – 19 |
| Cabbage | Dec 22 – Jan 5 | Feb 16 – Mar 2 | Sep 5 – 19 |
| Garlic | – | – | Oct 3 – 24 |
| Warm-season crops | |||
| Tomatoes | Feb 10 – 24 | Apr 7 – 21 | – |
| Peppers | Feb 3 – 17 | Apr 14 – 28 | – |
| Cucumbers | – | Apr 7 – 28 | – |
| Zucchini | – | Apr 7 – May 5 | – |
| Pumpkins | – | Apr 7 – 28 | – |
| Green beans | – | Apr 7 – Sep 5 | – |
| Sweet corn | – | Apr 7 – May 5 | – |
| Basil | Mar 3 – 17 | Apr 14 – 21 | – |
Onions: from sets. Green beans: until 10 weeks before the first fall frost. Garlic: harvest next summer.
The year at a glance
Start indoors Plant outside Fall planting
The chance of frost, by date
| 1 year in 10 | Half of years | 9 years in 10 | |
|---|---|---|---|
| Spring frost after | April 7 | March 16 | February 21 |
| Fall frost before | October 27 | November 14 | December 6 |
Frost here means 32°F or colder. Read across: in 1 year in 10, spring frost carries on past the first date, which is why that date is the safe-to-plant date.
Hard freeze (28°F)
A hard freeze kills most garden plants, even hardy ones. The last one in spring usually comes around February 15 (March 8 in a late year), and the first one in fall around December 1.
Towns that use these dates
This is the nearest NOAA station with frost records for 5 towns.
Woodburn, Hubbard, Aurora, Donald, Barlow
Where these dates come from
NOAA weather station AURORA STATE AP, OR US (USW00094281), 1991–2020 climate normals. It's the nearest station for 5 zip codes, all within 8 miles:
97002, 97013, 97020, 97032, 97071
Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.