Martha, OK 73522 Frost Dates
When can you plant in Martha, OK?
Around 04/10 is the usual last spring frost, about 225 days away. The first fall frost typically arrives around 10/29, about 201 frost-free days later.
The USDA Plant Hardiness Zone Map puts Martha 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 9 weeks of growing season left in Martha before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
The actual range around Martha's last frost
04/10 is the middle of 30 years of NOAA records, not a promise. Plant by 03/26 and you're betting against frost in roughly 9 years out of 10. 04/27 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Martha compares
At roughly 201 frost-free days, Martha places 17,673 of 40,283 ZIP codes in this dataset. Within OK, it ranks 654 of 764.
Learn more
zone vs. frost date covers why Zone 7b and Martha's frost date answer different questions. the frost range covers how to read the range around Martha's dates instead of trusting one.