The 5 Best Annual Flowers For Zone 5
What Are Plant Zones? The United States Department of Agriculture (USDA) developed and maintains the Plant Hardiness Map. This map is split into 13 areas called zones to help gardeners select plants that will thrive in that area. Zones are organized according to the lowest average winter temperatures in those areas like a weather map. All zones are further classified as northern or southern as well. For example, Zone 5a indicates this is the northern part of the zone, while Zone 5b indicates the south....