Do rhododendrons grow in Maine? (Most of it ... questions quickly is the US Department of Agriculture plant hardiness zone map. While that's a mouthful, it's a simple way to determine which ...

In previous years Southern Maine was in zones 5B/5A and as of ... check the 2023 USDA Plant Hardiness Zone Map for more information.

The map is based on the 30-year average of the lowest annual winter temperatures for specific places. It is divided into 13 zones, each reflecting a 10-degree temperature range, and each zone is ...