Greenfield, OH 45123 Frost Dates
Greenfield, OH: when does the frost end?
Typically, the last spring freeze lands around 04/20, roughly 235 days out. Fall's first freeze usually shows up around 10/22, roughly 184 days after the last spring frost.
The USDA Plant Hardiness Zone Map puts Greenfield in Zone 6b (-5 to 0°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 8 weeks until Greenfield's first fall frost, a row cover or cold frame is what stretches the last few weeks of harvest here.
Why 04/20 isn't a guarantee
04/20 is the middle of 30 years of NOAA records, not a promise. Getting tender plants in by 04/06 carries real risk, frost has hit that late in about 9 of 10 years here. Wait until 05/07 and only about 1 year in 10 sees frost after that.
Greenfield against the rest of the dataset
Greenfield's growing season runs about 184 days, ranking 23,512 of 40,283 US ZIP codes measured here, longest to shortest. Within OH, it ranks 628 of 1,383.
Learn more
Before leaning on 45123's figures: the frost range explains how to read the range around Greenfield's dates instead of trusting one, while local microclimates explains what one yard in Greenfield can differ from the 45123 normal.