Oak Grove, MN 55011 Frost Dates
When can you plant in Oak Grove, MN?
Typically, the last spring freeze lands around 05/01, roughly 246 days out. The first fall frost typically arrives around 10/07, about 158 frost-free days later.
Oak Grove sits in USDA Zone 4b (-25 to -20°F average annual minimum). The dates above are NOAA's 1991-2020 normal at the nearest reporting station, a 30-year average, not a forecast.
What to do before the first frost
About 6 weeks of growing season left in Oak Grove before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
05/01 is the middle of 30 years of NOAA records, not a promise. Plant by 04/17 and you're betting against frost in roughly 9 years out of 10. 05/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Oak Grove compares
Oak Grove's growing season runs about 158 days, ranking 32,936 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 283 of 943.
Learn more
zone vs. frost date covers why Zone 4b and Oak Grove's frost date answer different questions. the frost range covers how to read the range around Oak Grove's dates instead of trusting one.