The post 39 Recommended Perennials for Zone 3 and 4 Gardens is by Jerad Bryant and appeared first on Epic Gardening, the best ...

The hardiness of a plant is largely measured by how well it can withstand cold winter temperatures, so something that can survive the minimum temperature in Zone 5 would find Zone 4 to be too cold.

Knowing when to plant in specific hardiness zones is important to maximize the spring season's potential. A hardiness zone is a geographic area with a similar average minimum temperature.

Zone 4 shifted north, as well. The USDA released a new zone map recently, moving much of the Twin Cities metro and southern Minnesota into zone 5. The zone 4 line shifted north, as well.