Warming Winters Shift Planting Zones in the DC Region
Climate change is causing a significant shift in planting zones across the United States, including the DC region. Historically classified as Zone 7b, parts of the area are now transitioning to Zone 8a due to milder winters. This change impacts what can be grown, pest patterns, and the length of the growing season. According to Climate Central, 67% of U.S. locations have shifted to warmer zones since the mid-20th century, with an average increase of 3.7°F in coldest temperatures. For gardeners in DC, Maryland, and Virginia, this means new opportunities to grow plants previously suited for southern climates, such as figs and citrus, while also facing challenges from invasive species and pests migrating northward.