Topeka, KS 66622 Frost Dates
When can you plant in Topeka, KS?
Around 04/16 is the usual last spring frost, about 231 days away. The first fall frost typically arrives around 10/22, about 189 frost-free days later.
The USDA Plant Hardiness Zone Map puts Topeka 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 Topeka before the first fall frost — a cold frame or row cover can stretch harvest weeks past that date.
Why 04/16 isn't a guarantee
04/16 is the middle of 30 years of NOAA records, not a promise. Plant by 04/01 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 Topeka compares
Topeka's growing season runs about 189 days, ranking 21,374 of 40,283 US ZIP codes measured here, longest to shortest. Within KS, it ranks 315 of 745.
Learn more
zone vs. frost date covers why Zone 6b and Topeka's frost date answer different questions. the frost range covers how to read the range around Topeka's dates instead of trusting one.