Data: 2023 USDA zones (PRISM/OSU) · NOAA 1991–2020 normals · updated

Zone 7b

In USDA zone 7b the coldest night of an average winter reaches 5 to 10 °F (−15 to −12.2 °C). 3,855 ZIP codes (9.5% of all) are in this zone.

Zone7b5 to 10 °F
Coldest night−15 to −12.2 °C
ZIP codes3,855
Typical last frostApr 5
Typical first frostNov 1

Frost dates vary within zone 7b

For the middle half of zone-7b ZIP codes the last spring frost falls between Apr 1 and Apr 11, and the first fall frost between Oct 29 and Nov 6. The zone measures winter cold, not season length: humid Eastern and dry Western towns in the same zone can be weeks apart. Use your ZIP code for a planting date.

States with zone 7b

Tennessee544 ZIPsVirginia516 ZIPsNew York485 ZIPsOklahoma460 ZIPsMaryland367 ZIPsNew Jersey289 ZIPsNorth Carolina174 ZIPsArkansas156 ZIPsPennsylvania153 ZIPsNew Mexico105 ZIPsDelaware88 ZIPsTexas88 ZIPsUtah59 ZIPsMissouri52 ZIPsAlabama49 ZIPs

Cities mostly in zone 7b

New York, NY136 ZIPsPhiladelphia, PA87 ZIPsOklahoma City, OK74 ZIPsTulsa, OK51 ZIPsSalt Lake City, UT47 ZIPsBrooklyn, NY45 ZIPsRoanoke, VA40 ZIPsAlbuquerque, NM40 ZIPsBaltimore, MD38 ZIPsRichmond, VA37 ZIPsNashville, TN36 ZIPsKnoxville, TN29 ZIPs

← Zone 7a (colder)Zone 8a (warmer) →

Questions

What is the temperature range of zone 7b?

Zone 7b covers places where the coldest night of an average winter (the annual extreme minimum averaged over 1991–2020) is 5 to 10 °F, or −15 to −12.2 °C.

When is the last frost in zone 7b?

Across ZIP codes in zone 7b, the median last spring frost falls between Apr 1 and Apr 11 for the middle half of places. Zone alone doesn't set the frost date — check your ZIP code.

Which states have zone 7b?

Zone 7b occurs in 29 states; the most ZIP codes are in Tennessee, Virginia, New York, Oklahoma, Maryland.

What can I grow in zone 7b?

Perennials, shrubs and trees labeled hardy to zone 7b or a lower (colder) number should survive a typical winter. Annual vegetables depend on frost dates rather than zone.

Not the official USDA Plant Hardiness Zone Map. Zones come from the 2023 USDA hardiness-zone data by the PRISM Group, Oregon State University; we re-mapped and recolored them. The official map is at planthardiness.ars.usda.gov.