When to plant in Woodburn, OR
USDA Zone 8bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Woodburn, Oregon — all computed from Woodburn's nearest NOAA weather station.
With about 243 frost-free days, Woodburn supports back-to-back plantings; stagger sowings every few weeks to keep beds productive spring through fall. In zone 8b, Woodburn supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
The average last spring frost in Woodburn is now 6 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
AURORA STATE AP · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Woodburn’s own odds, recorded at AURORA STATE AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 4 | Apr 15 | Mar 27 | Oct 9 | Oct 26 | Nov 14 |
| 32°F | Apr 7 | Mar 16 | Feb 21 | Oct 27 | Nov 14 | Dec 6 |
| 28°F | Mar 8 | Feb 15 | Jan 4 | Nov 9 | Dec 1 | Dec 30 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in Woodburn, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 17 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Woodburn planting FAQ
When is the last spring frost in Woodburn, OR?
On average, the last spring frost in Woodburn is around March 16 (50% probability at 32°F, from 1991–2020 NOAA normals). Wait until after this date to set out tender plants like tomatoes and peppers.
When is the first fall frost in Woodburn, OR?
The first fall frost in Woodburn typically arrives around November 14 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Woodburn in?
Woodburn is in USDA hardiness zone 8b. In zone 8b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Woodburn?
Woodburn has about 243 frost-free days — a long growing season — between the average last spring frost (March 16) and first fall frost (November 14).
When should I plant tomatoes in Woodburn?
For Woodburn, sow tomatoes indoors about January 19–February 2 and move the seedlings out around March 23, after the last spring frost.
Never miss a window in Woodburn
An email when it’s time to start seeds, transplant, and sow — timed to Woodburn’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Silverton · 17 km
- Canby · 19 km
- Newberg · 19 km
- Wilsonville · 20 km
- Keizer · 21 km
- Hayesville · 21 km
- Molalla · 22 km
- Sherwood · 24 km
Frost dates recorded at AURORA STATE AP, 13 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Woodburn, OR — Frost Dates & Zone 8b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00094281. Retrieved from https://blissgarden.com/oregon/woodburn.