Hardiness Zones

The USDA updated the Plant Hardiness Zone Map in November of 2023, after Nourse Farms published its 2024 catalog. This is the first significant update to this map since 2012. With more data available, this map is more detailed than previous Plant Hardiness Zone Maps from the USDA.

The map below was provided by the USDA, however, we strongly recommend that you learn about your current zone and how to adapt to these changes by visiting the USDA’s interactive map: https://planthardiness.ars.usda.gov.

Nourse Farms Recommended Planting Season
Low Temperatures
Zone 3 (a & b)
May 5 on
-40° to -30°
Zone 4 (a & b)
May 15 to June 15
-30° to -20°
Zone 5 (a & b)
May 1 to June 1
-20° to -10°
Zone 6 (a & b)
April 15 to May 30
-10° to 0°
Zone 7 (a & b)
April 1 to May 15
0° to 10°
Zone 8 (a & b)
March 1 to April 20
10° to 20°
Zone 9 (a & b)
February 1 to April 15
20° to 30°
Zone 10 (a & b)
January 15 to April 1
30° to 40°

Plant Hardiness Zones are used as a guideline to determine the climate adaptability of plants. The zone designations and ship date recommendations that we list are estimates based on the information available to us. In selecting varieties, we suggest you be conservative regarding the zone for best results. As always, if you have any questions, call us at 413-665-2658.