Ada, OK 74821 Frost Dates
When can you plant in Ada, OK?
Around 04/02 is the usual last spring frost, about 217 days away. The first fall frost typically arrives around 11/04, about 217 frost-free days later.
The USDA Plant Hardiness Zone Map puts Ada in Zone 7b (5 to 10°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 10 weeks of growing season left in Ada 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
04/02 is the middle of 30 years of NOAA records, not a promise. Plant by 03/14 and you're betting against frost in roughly 9 years out of 10. 04/18 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Ada compares
Ada's growing season runs about 217 days, ranking 13,428 of 40,283 US ZIP codes measured here, longest to shortest. Within OK, it ranks 250 of 764.
Learn more
local microclimates covers what one yard in Ada can differ from the 74821 normal. zone vs. frost date covers why Zone 7b and Ada's frost date answer different questions.