Cottage Grove, OR 97424 Frost Dates
When can you plant in Cottage Grove, OR?
Around 04/24 is the usual last spring frost, about 239 days away. The first fall frost typically arrives around 10/25, about 183 frost-free days later.
The USDA Plant Hardiness Zone Map puts Cottage Grove in Zone 8b (15 to 20°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
About 8 weeks of growing season left in Cottage Grove before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/24 isn't a guarantee
04/24 is the middle of 30 years of NOAA records, not a promise. Plant by 03/31 and you're betting against frost in roughly 9 years out of 10. 05/10 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Cottage Grove compares
At roughly 183 frost-free days, Cottage Grove places 23,809 of 40,283 ZIP codes in this dataset. Within OR, it ranks 293 of 463.
Learn more
the frost range covers how to read the range around Cottage Grove's dates instead of trusting one. local microclimates covers what one yard in Cottage Grove can differ from the 97424 normal.