When to plant in Silver Firs, WA
USDA Zone 8bEverything below — frost dates, hardiness zone, and what to plant when in Silver Firs, Washington — is derived from the closest NOAA station with complete climate normals.
A generous ~253-day season lets Silver Firs gardeners direct-sow more and still ripen long-maturity crops like melons and winter squash. Zone 8b means many perennials and even some tender shrubs overwinter in Silver Firs, while your frost dates still decide when annuals go out.
Frost probability
EVERETT SNOHOMISH 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 Silver Firs’s own odds, recorded at EVERETT SNOHOMISH AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 27 | Apr 3 | Mar 15 | Oct 19 | Nov 2 | Nov 20 |
| 32°F | Mar 29 | Mar 9 | Feb 15 | Oct 31 | Nov 17 | Dec 7 |
| 28°F | Mar 9 | Feb 13 | Jan 1 | Nov 15 | Dec 6 | Jan 8 |
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 Silver Firs, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 13 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.
Silver Firs planting FAQ
When is the last spring frost in Silver Firs, WA?
On average, the last spring frost in Silver Firs is around March 9 (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 Silver Firs, WA?
Expect Silver Firs's first fall frost near November 17 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Silver Firs in?
Silver Firs is in USDA hardiness zone 8b. In zone 8b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Silver Firs?
There are roughly 253 frost-free days in Silver Firs (a long growing season), running from the average last frost around March 9 to the first fall frost near November 17.
When should I plant tomatoes in Silver Firs?
In Silver Firs, start tomato seeds indoors around January 12–January 26, then transplant seedlings outdoors around March 16 once the danger of frost has passed.
Never miss a window in Silver Firs
An email when it’s time to start seeds, transplant, and sow — timed to Silver Firs’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Mill Creek East · 4 km
- Eastmont · 4 km
- Mill Creek · 5 km
- Martha Lake · 7 km
- Bothell East · 7 km
- Maltby · 8 km
- Lake Stickney · 8 km
- Snohomish · 8 km
Frost dates recorded at EVERETT SNOHOMISH AP, 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 Silver Firs, WA — Frost Dates & Zone 8b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00024222. Retrieved from https://blissgarden.com/washington/silver-firs.