When to plant in Roseburg, OR
USDA Zone 8bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Roseburg, Oregon — all computed from Roseburg's nearest NOAA weather station.
Zone 8b means many perennials and even some tender shrubs overwinter in Roseburg, while your frost dates still decide when annuals go out.
The average last spring frost in Roseburg is now 5 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
ROSEBURG KQEN · 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 Roseburg’s own odds, recorded at ROSEBURG KQEN.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 9 | Apr 21 | Mar 31 | Oct 8 | Oct 25 | Nov 17 |
| 32°F | Apr 16 | Mar 23 | Feb 25 | Oct 24 | Nov 18 | Dec 17 |
| 28°F | Mar 21 | Feb 20 | Dec 31 | Nov 8 | Dec 11 | Jan 31 |
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 Roseburg, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 7 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.
Roseburg planting FAQ
When is the last spring frost in Roseburg, OR?
On average, the last spring frost in Roseburg is around March 23 (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 Roseburg, OR?
In Roseburg, the first 32°F freeze of fall lands around November 18 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Roseburg in?
Roseburg is in USDA hardiness zone 8b. In zone 8b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Roseburg?
There are roughly 240 frost-free days in Roseburg (a long growing season), running from the average last frost around March 23 to the first fall frost near November 18.
When should I plant tomatoes in Roseburg?
In Roseburg, start tomato seeds indoors around January 26–February 9, then transplant seedlings outdoors around March 30 once the danger of frost has passed.
Never miss a window in Roseburg
An email when it’s time to start seeds, transplant, and sow — timed to Roseburg’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Cottage Grove · 68 km
- Coos Bay · 73 km
- North Bend · 74 km
- Grants Pass · 88 km
- Eugene · 95 km
- Springfield · 97 km
- White City · 98 km
- Santa Clara · 101 km
Frost dates recorded at ROSEBURG KQEN, 2 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 Roseburg, OR — Frost Dates & Zone 8b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00357331. Retrieved from https://blissgarden.com/oregon/roseburg.