Frost-free Planting Dates and Plant Protection in Zones 5b & 6a

Frost-free Planting Dates and Plant Protection in Zones 5b & 6a

Climate change adds complexity to predicting frost-free dates by influencing weather patterns and subsequently the growing seasons across the globe. The USDA Hardiness Zones (also known as climate zones) were widely used to provide an average expectation of minimum winter temperatures. But there were never any specific frost dates.