Greenbush, MN 56726 Frost Dates
Frost dates for Greenbush, MN, ZIP 56726
The last spring frost here typically falls around 05/06, about 251 days from today. The first fall frost typically arrives around 10/03, about 148 frost-free days later.
The USDA Plant Hardiness Zone Map puts Greenbush in Zone 3b (-35 to -30°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
Zone 3b around Greenbush has about 5 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Greenbush's last frost
05/06 is the middle of 30 years of NOAA records, not a promise. Plant by 04/25 and you're betting against frost in roughly 9 years out of 10. 05/20 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Greenbush compares
About 148 days separate Greenbush's last and first frost, putting it 35,770 of 40,283 ZIP codes nationally. Within MN, it ranks 588 of 943.
Learn more
local microclimates explains what one yard in Greenbush can differ from the 56726 normal, and zone vs. frost date explains why Zone 3b and Greenbush's frost date answer different questions.