Gladstone, ND 58630 Frost Dates
Gladstone, ND: when does the frost end?
The last spring frost here typically falls around 05/20, about 265 days from today. Fall's first freeze usually shows up around 09/22, roughly 123 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Gladstone in Zone 4a (-30 to -25°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
With roughly 4 weeks until Gladstone's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
How much risk comes with planting early here
05/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 05/08 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 06/01 and only about 1 year in 10 sees frost after that.
Gladstone against the rest of the dataset
Gladstone's growing season runs about 123 days, ranking 38,924 of 40,283 US ZIP codes measured here, longest to shortest. Within ND, it ranks 377 of 405.
Learn more
Before leaning on 58630's figures: the frost range explains how to read the range around Gladstone's dates instead of trusting one, while local microclimates explains what one yard in Gladstone can differ from the 58630 normal.