The growing season in the Mid-Atlantic is generally expected to increase by 21 days or more by the end of the century, due to fewer days with a minimum temperatures below 32°F.

Evidence at both global and local scales indicates that growing seasons have been getting longer, and this trend is projected to become even more pronounced over the next century. Warmer temperatures will result in fewer days with minimum temperatures below 32°F and a shorter freeze-free season. Winter or early-spring warmth has caused plants to start growing and emerge from winter dormancy earlier in the spring.