When to plant in Grandview, WA
USDA Zone 7bEverything below — frost dates, hardiness zone, and what to plant when in Grandview, Washington — is derived from the closest NOAA station with complete climate normals.
Zone 7b means many perennials and even some tender shrubs overwinter in Grandview, while your frost dates still decide when annuals go out.
The average last spring frost in Grandview is now 10 days later than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
SUNNYSIDE · 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 Grandview’s own odds, recorded at SUNNYSIDE.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Jun 7 | May 16 | May 1 | Sep 10 | Sep 25 | Oct 7 |
| 32°F | May 18 | May 1 | Apr 16 | Sep 25 | Oct 6 | Oct 22 |
| 28°F | May 1 | Apr 15 | Mar 28 | Oct 5 | Oct 19 | Nov 4 |
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 Grandview, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 14 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.
Grandview planting FAQ
When is the last spring frost in Grandview, WA?
Plan for the last spring frost in Grandview around May 1 (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 Grandview, WA?
The first fall frost in Grandview typically arrives around October 6 (50% probability at 32°F). Harvest or protect frost-sensitive crops before then.
What hardiness zone is Grandview in?
Grandview is in USDA hardiness zone 7b. In zone 7b, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Grandview?
There are roughly 158 frost-free days in Grandview (a moderate growing season), running from the average last frost around May 1 to the first fall frost near October 6.
When should I plant tomatoes in Grandview?
In Grandview, start tomato seeds indoors around March 6–March 20, then transplant seedlings outdoors around May 8 once the danger of frost has passed.
Never miss a window in Grandview
An email when it’s time to start seeds, transplant, and sow — timed to Grandview’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Sunnyside · 11 km
- West Richland · 41 km
- Richland · 48 km
- Terrace Heights · 57 km
- Kennewick · 57 km
- Pasco · 61 km
- Yakima · 62 km
- Hermiston · 66 km
Frost dates recorded at SUNNYSIDE, 12 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 Grandview, WA — Frost Dates & Zone 7b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00458207. Retrieved from https://blissgarden.com/washington/grandview.