Hollandale, MN 56045 Frost Dates
56045, near Hollandale, MN: the frost window
Around 04/27 is the usual last spring frost, about 242 days away. Fall's first freeze usually shows up around 10/09, roughly 164 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Hollandale in Zone 4b (-25 to -20°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
Stretching the season past the first frost
Hollandale's growing season runs out in roughly 6 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 04/27 isn't a guarantee
04/27 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/12 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/10 and only about 1 year in 10 sees frost after that.
Hollandale against the rest of the dataset
Hollandale's growing season runs about 164 days, ranking 31,178 of 40,283 US ZIP codes measured here, longest to shortest. Within MN, it ranks 120 of 943.
Learn more
Two guides worth reading on 56045: local microclimates, on what one yard in Hollandale can differ from the 56045 normal, and zone vs. frost date, on why Zone 4b and Hollandale's frost date answer different questions.