Flushing, MI 48557 Frost Dates
48557, near Flushing, MI: the frost window
Around 05/03 is the usual last spring frost, about 248 days away. Fall's first freeze usually shows up around 10/13, roughly 162 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Flushing in Zone 6a (-10 to -5°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
Flushing's growing season runs out in roughly 7 weeks — a cold frame or greenhouse kit is the usual way to keep cool-weather crops going past the first frost.
Why 05/03 isn't a guarantee
05/03 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/20 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/20 and only about 1 year in 10 sees frost after that.
Flushing against the rest of the dataset
At roughly 162 frost-free days, Flushing places 31,699 of 40,283 ZIP codes in this dataset. Within MI, it ranks 545 of 1,153.
Learn more
Two guides worth reading on 48557: zone vs. frost date, on why Zone 6a and Flushing's frost date answer different questions, and the frost range, on how to read the range around Flushing's dates instead of trusting one.