21 Best Shade Perennials For Zone 4
SDA Plant Hardiness Zone 4 is part of the United States Department of Agriculture’s (USDA) zoning system, which helps gardeners determine which perennial plants can survive winter temperatures in specific regions. This zone is characterized by average annual minimum temperatures ranging from -30°F to -20°F, subdivided into Zone 4a (-30°F to -25°F) and Zone 4b … Read more