Frost dates are the average dates of the and the first fall frost . They are calculated based on historical climate data from the National Oceanic and Atmospheric Administration (NOAA) and are used to define a region's "growing season".
Not all cold is created equal. Depending on the temperature, your plants may face different levels of risk: Light Frost ( 33∘F33 raised to the composed with power F 36∘F36 raised to the composed with power F Frost.aa.zip
These dates represent a 30% to 50% probability that frost will occur after the spring date or before the fall date. Local microclimates—such as being under a tree canopy or near a body of water—can shift these dates significantly. Frost vs. Freeze: Why the Distinction Matters Frost dates are the average dates of the
or below): Causes heavy damage to almost all seasonal plants. Gardening Strategy by Frost Date Depending on the temperature, your plants may face
This is the window between your last spring frost and first fall frost when warm-weather plants thrive.
or below): Widespread ice formation that can severely damage or kill most unprotected vegetation. Hard Freeze ( 28∘F28 raised to the composed with power F
): May cause patchy damage to tender plants like tomatoes or basil. Freeze ( 32∘F32 raised to the composed with power F