When to plant in Lynnwood, WA
USDA Zone 9aLynnwood, Washington frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
With about 253 frost-free days, Lynnwood supports back-to-back plantings; stagger sowings every few weeks to keep beds productive spring through fall. In zone 9a, frost is a minor factor for Lynnwood — most perennials thrive, and annual vegetables can go out early and stay late.
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 Lynnwood’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 Lynnwood, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 18 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.
Lynnwood planting FAQ
When is the last spring frost in Lynnwood, WA?
On average, the last spring frost in Lynnwood 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 Lynnwood, WA?
In Lynnwood, the first 32°F freeze of fall lands around November 17 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Lynnwood in?
Lynnwood is in USDA hardiness zone 9a. In zone 9a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Lynnwood?
Lynnwood has about 253 frost-free days — a long growing season — between the average last spring frost (March 9) and first fall frost (November 17).
When should I plant tomatoes in Lynnwood?
For Lynnwood, sow tomatoes indoors about January 12–January 26 and move the seedlings out around March 16, after the last spring frost.
Never miss a window in Lynnwood
An email when it’s time to start seeds, transplant, and sow — timed to Lynnwood’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Alderwood Manor · 3 km
- North Lynnwood · 3 km
- Mountlake Terrace · 4 km
- Edmonds · 4 km
- Bothell West · 5 km
- Picnic Point · 5 km
- Martha Lake · 5 km
- Lake Stickney · 6 km
Frost dates recorded at EVERETT SNOHOMISH AP, 9 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 Lynnwood, WA — Frost Dates & Zone 9a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00024222. Retrieved from https://blissgarden.com/washington/lynnwood.