Zone 7b Frost Dates & Planting Calendar

What zone 7b actually tells you

The 2023 USDA Plant Hardiness Zone Map puts a place in zone 7b when the coldest night of the year averaged 5 to 10°F (-15.0 to -12.2°C) over 1991–2020. The zone says which perennials survive the winter, not when to plant in spring.

Across the 518 NOAA stations behind zone 7b ZIP pages, the median 50% last spring frost is April 7 and the median first fall frost October 31; the last frost alone ranges from March 12 to June 3 from one station to another.

Frost dates answer the planting question, and they are read from the nearest NOAA station, not from the zone. The zone 7b ZIP codes here lie in 30 states; pick your own ZIP code below, or look up the zone of any ZIP code.