First Frost 22405. Your first frost date (or first fall frost) marks the end of the growing season for most plants. Our information is taken directly from the national weather service and depending on the location of the reporting station for your zip code, the results may vary.

Scroll down further to find two tables, each giving the estimated dates for 90%, 50%, and 10% chance of frost before the first frost date or after the last frost date of the year. Your first frost date (or first fall frost) marks the end of the growing season for most plants.