Potlatch, ID 83872 Frost Dates
When can you plant in Potlatch, ID?
Typically, the last spring freeze lands around 05/15, roughly 260 days out. The first fall frost typically arrives around 09/21, about 126 frost-free days later.
Zone 6b (-5 to 0°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 Potlatch, not a forecast for this year.
What to do before the first frost
About 3 weeks of growing season left in Potlatch before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 05/15 isn't a guarantee
05/15 is the middle of 30 years of NOAA records, not a promise. Plant by 04/30 and you're betting against frost in roughly 9 years out of 10. 06/02 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Potlatch compares
At roughly 126 frost-free days, Potlatch places 38,696 of 40,283 ZIP codes in this dataset. Within ID, it ranks 191 of 320.
Learn more
zone vs. frost date covers why Zone 6b and Potlatch's frost date answer different questions. the frost range covers how to read the range around Potlatch's dates instead of trusting one.