When to plant in Frederickson, WA
USDA Zone 8bHere are the average frost dates, USDA hardiness zone, and a month-by-month planting calendar for Frederickson, Washington — all computed from Frederickson's nearest NOAA weather station.
Zone 8b means many perennials and even some tender shrubs overwinter in Frederickson, while your frost dates still decide when annuals go out.
Frost probability
MCMILLIN RSVR · 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 Frederickson’s own odds, recorded at MCMILLIN RSVR.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 17 | May 1 | Apr 17 | Sep 30 | Oct 12 | Oct 31 |
| 32°F | Apr 29 | Apr 11 | Mar 23 | Oct 13 | Oct 30 | Nov 17 |
| 28°F | Apr 8 | Mar 16 | Feb 19 | Oct 28 | Nov 14 | Dec 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 Frederickson, 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.
Frederickson planting FAQ
When is the last spring frost in Frederickson, WA?
Frederickson's average last spring frost falls near April 11 — 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 Frederickson, WA?
Expect Frederickson's first fall frost near October 30 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Frederickson in?
Frederickson is in USDA hardiness zone 8b. In zone 8b, winters are mild — many tender perennials overwinter here.
How long is the growing season in Frederickson?
There are roughly 202 frost-free days in Frederickson (a moderate growing season), running from the average last frost around April 11 to the first fall frost near October 30.
When should I plant tomatoes in Frederickson?
In Frederickson, start tomato seeds indoors around February 14–February 28, then transplant seedlings outdoors around April 18 once the danger of frost has passed.
Never miss a window in Frederickson
An email when it’s time to start seeds, transplant, and sow — timed to Frederickson’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Spanaway · 5 km
- Elk Plain · 6 km
- South Hill · 7 km
- Parkland · 8 km
- Graham · 9 km
- Puyallup · 11 km
- Lakewood · 15 km
- Fort Lewis · 16 km
Frost dates recorded at MCMILLIN RSVR, 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 Frederickson, WA — Frost Dates & Zone 8b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00455224. Retrieved from https://blissgarden.com/washington/frederickson.