When to plant in Grants Pass, OR
USDA Zone 8bGrants Pass, Oregon frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
In zone 8b, Grants Pass 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 Grants Pass is now 10 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
GRANTS PASS · 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 Grants Pass’s own odds, recorded at GRANTS PASS.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 30 | May 2 | Apr 14 | Sep 23 | Oct 11 | Oct 31 |
| 32°F | May 1 | Apr 8 | Mar 15 | Oct 8 | Oct 28 | Nov 24 |
| 28°F | Apr 5 | Mar 8 | Jan 19 | Oct 22 | Nov 16 | Dec 27 |
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 Grants Pass, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 33 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.
Grants Pass planting FAQ
When is the last spring frost in Grants Pass, OR?
On average, the last spring frost in Grants Pass is around April 8 (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 Grants Pass, OR?
The first fall frost in Grants Pass typically arrives around October 28 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Grants Pass in?
Grants Pass is in USDA hardiness zone 8b. In zone 8b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Grants Pass?
Grants Pass has about 203 frost-free days — a moderate growing season — between the average last spring frost (April 8) and first fall frost (October 28).
When should I plant tomatoes in Grants Pass?
For Grants Pass, sow tomatoes indoors about February 11–February 25 and move the seedlings out around April 15, after the last spring frost.
Never miss a window in Grants Pass
An email when it’s time to start seeds, transplant, and sow — timed to Grants Pass’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Central Point · 35 km
- Medford · 41 km
- White City · 41 km
- Ashland · 59 km
- Roseburg · 88 km
- Coos Bay · 129 km
- Klamath Falls · 130 km
- North Bend · 131 km
Frost dates recorded at GRANTS PASS, 1 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 Grants Pass, OR — Frost Dates & Zone 8b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00353445. Retrieved from https://blissgarden.com/oregon/grants-pass.