The average date of the last spring frost or first fall frost in a specific location, helping gardeners determine the length of the growing season.
Frost dates act as seasonal guideposts for gardeners. The last spring frost marks the approximate time when frost danger is ending, while the first fall frost signals when frost-sensitive plants may begin to suffer damage.
The period between these two dates is known as the frost-free growing season. This window determines how much time gardeners have to grow vegetables, flowers, and other crops before cold weather returns.
Because frost dates are based on historical averages, they serve as planning tools rather than exact predictions. Local weather and microclimate conditions can cause frost to occur earlier or later than expected.
Frost dates help gardeners decide when to plant, transplant, and harvest crops. Understanding these dates reduces the risk of frost damage and makes it easier to select crops that can mature within the available growing season.