Poulsbo, WA 98320 Frost Dates
When can you plant in Poulsbo, WA?
Around 03/29 is the usual last spring frost, about 213 days away. The first fall frost typically arrives around 11/14, about 227 frost-free days later.
Zone 8b (15 to 20°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Poulsbo, not a forecast for this year.
What to do before the first frost
About 11 weeks of growing season left in Poulsbo before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 03/29 isn't a guarantee
03/29 is the middle of 30 years of NOAA records, not a promise. Plant by 03/05 and you're betting against frost in roughly 9 years out of 10. 04/24 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Poulsbo compares
Poulsbo's growing season runs about 227 days, ranking 10,979 of 40,283 US ZIP codes measured here, longest to shortest. Within WA, it ranks 199 of 700.
Learn more
zone vs. frost date covers why Zone 8b and Poulsbo's frost date answer different questions. the frost range covers how to read the range around Poulsbo's dates instead of trusting one.