When to plant in Mill Creek East, WA
USDA Zone 8bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Mill Creek East, Washington — all computed from Mill Creek East's nearest NOAA weather station.
A generous ~253-day season lets Mill Creek East gardeners direct-sow more and still ripen long-maturity crops like melons and winter squash. In zone 8b, Mill Creek East supports a wide range of perennials year-round; the frost dates above are what set your annual vegetable timing.
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 Mill Creek East’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 Mill Creek East, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 15 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.
Mill Creek East planting FAQ
When is the last spring frost in Mill Creek East, WA?
Plan for the last spring frost in Mill Creek East around March 9 (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 Mill Creek East, WA?
In Mill Creek East, 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 Mill Creek East in?
Mill Creek East is in USDA hardiness zone 8b. In zone 8b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Mill Creek East?
Mill Creek East 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 Mill Creek East?
For Mill Creek East, 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 Mill Creek East
An email when it’s time to start seeds, transplant, and sow — timed to Mill Creek East’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Bothell East · 3 km
- Martha Lake · 4 km
- Mill Creek · 4 km
- Silver Firs · 4 km
- Bothell West · 5 km
- Alderwood Manor · 6 km
- Lake Stickney · 7 km
- Eastmont · 7 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 Mill Creek East, WA — Frost Dates & Zone 8b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00024222. Retrieved from https://blissgarden.com/washington/mill-creek-east.