Tulsa, OK 74145 Frost Dates
When can you plant in Tulsa, OK?
The last spring frost here typically falls around 03/30, about 214 days from today. The first fall frost typically arrives around 11/04, about 220 frost-free days later.
Zone 7b (5 to 10°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Tulsa, not a forecast for this year.
What to do before the first frost
About 10 weeks of growing season left in Tulsa before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 03/30 isn't a guarantee
03/30 is the middle of 30 years of NOAA records, not a promise. Plant by 03/10 and you're betting against frost in roughly 9 years out of 10. 04/17 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Tulsa compares
Tulsa's growing season runs about 220 days, ranking 12,671 of 40,283 US ZIP codes measured here, longest to shortest. Within OK, it ranks 156 of 764.
Learn more
local microclimates covers what one yard in Tulsa can differ from the 74145 normal. zone vs. frost date covers why Zone 7b and Tulsa's frost date answer different questions.