When to plant in Lynden, WA
USDA Zone 8aLynden, Washington frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
Zone 8a means many perennials and even some tender shrubs overwinter in Lynden, while your frost dates still decide when annuals go out.
Frost probability
CLEARBROOK · 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 Lynden’s own odds, recorded at CLEARBROOK.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 22 | May 7 | Apr 23 | Sep 10 | Sep 29 | Oct 14 |
| 32°F | May 5 | Apr 18 | Mar 27 | Sep 28 | Oct 18 | Nov 8 |
| 28°F | Apr 8 | Mar 18 | Feb 25 | Oct 20 | Nov 7 | Dec 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 Lynden, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 25 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.
Lynden planting FAQ
When is the last spring frost in Lynden, WA?
Lynden's average last spring frost falls near April 18 — the 50% mark at 32°F in the 1991–2020 normals. Hold tender transplants until the risk has passed, then plant out.
When is the first fall frost in Lynden, WA?
In Lynden, the first 32°F freeze of fall lands around October 18 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Lynden in?
Lynden is in USDA hardiness zone 8a. In zone 8a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Lynden?
There are roughly 183 frost-free days in Lynden (a moderate growing season), running from the average last frost around April 18 to the first fall frost near October 18.
When should I plant tomatoes in Lynden?
In Lynden, start tomato seeds indoors around February 21–March 7, then transplant seedlings outdoors around April 25 once the danger of frost has passed.
Never miss a window in Lynden
An email when it’s time to start seeds, transplant, and sow — timed to Lynden’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Ferndale · 15 km
- Birch Bay · 21 km
- Bellingham · 22 km
- Sedro-Woolley · 51 km
- Anacortes · 53 km
- Burlington · 55 km
- Mount Vernon · 60 km
- Oak Harbor · 74 km
Frost dates recorded at CLEARBROOK, 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 Lynden, WA — Frost Dates & Zone 8a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00451484. Retrieved from https://blissgarden.com/washington/lynden.