Plant Zone Map 2024 Usa. Compare the plants zones to your zone to decide if you can grow it as a perennial. Department of agriculture (usda) released a new version of its plant hardiness zone map (phzm), updating this valuable tool for gardeners and researchers for the first time since 2012.
Maryland summers are humid and hot, with temperatures being cooler in the east. Over time they have changed a bit as temperatures have gotten warmer and the maps have updated.