Ottawa Hills, OH 43623 Frost Dates
When can you plant in Ottawa Hills, OH?
Typically, the last spring freeze lands around 04/22, roughly 237 days out. The first fall frost typically arrives around 10/24, about 188 frost-free days later.
The USDA Plant Hardiness Zone Map puts Ottawa Hills in Zone 6b (-5 to 0°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
About 8 weeks of growing season left in Ottawa Hills before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
How much risk comes with planting early here
04/22 is the middle of 30 years of NOAA records, not a promise. Plant by 04/06 and you're betting against frost in roughly 9 years out of 10. 05/07 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Ottawa Hills compares
About 188 days separate Ottawa Hills's last and first frost, putting it 22,008 of 40,283 ZIP codes nationally. Within OH, it ranks 383 of 1,383.
Learn more
zone vs. frost date covers why Zone 6b and Ottawa Hills's frost date answer different questions. the frost range covers how to read the range around Ottawa Hills's dates instead of trusting one.