When to plant in Sandy, OR
USDA Zone 8bSandy, Oregon frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
Zone 8b means many perennials and even some tender shrubs overwinter in Sandy, while your frost dates still decide when annuals go out.
Frost probability
HEADWORKS PORTLAND WTR B · 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 Sandy’s own odds, recorded at HEADWORKS PORTLAND WTR B.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 12 | Apr 26 | Apr 7 | Oct 12 | Oct 29 | Nov 18 |
| 32°F | Apr 20 | Mar 27 | Feb 26 | Oct 26 | Nov 18 | Dec 10 |
| 28°F | Mar 12 | Feb 14 | Jan 2 | Nov 12 | Dec 9 | Jan 19 |
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 Sandy, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 20 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.
Sandy planting FAQ
When is the last spring frost in Sandy, OR?
Plan for the last spring frost in Sandy around March 27 (the date it has a 50% chance of a 32°F freeze). Anything frost-sensitive should go out after it.
When is the first fall frost in Sandy, OR?
The first fall frost in Sandy typically arrives around November 18 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Sandy in?
Sandy is in USDA hardiness zone 8b. In zone 8b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Sandy?
There are roughly 236 frost-free days in Sandy (a long growing season), running from the average last frost around March 27 to the first fall frost near November 18.
When should I plant tomatoes in Sandy?
In Sandy, start tomato seeds indoors around January 30–February 13, then transplant seedlings outdoors around April 3 once the danger of frost has passed.
Never miss a window in Sandy
An email when it’s time to start seeds, transplant, and sow — timed to Sandy’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reachFrost dates recorded at HEADWORKS PORTLAND WTR B, 11 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 Sandy, OR — Frost Dates & Zone 8b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00353770. Retrieved from https://blissgarden.com/oregon/sandy.