What does a plant hardiness zone indicate?

• A. The coldest winter temperature a plant can tolerate in its area.
• B. The soil pH range best for the area
• C. The typical rainfall in the area
• D. The average summer high temperature

Answer: (A)

Plant hardiness zones tell you how cold winters get where you garden and what a plant can withstand to survive that winter. They’re based on the average minimum winter temperatures for a location, so choosing plants rated for your zone—or for zones colder than yours—gives them a better chance to survive the cold. This concept specifically reflects winter survival, not soil pH, rainfall, or summer heat. For example, if your area regularly experiences very cold winters, you’d look for plants hardy to that minimum temperature. Remember, microclimates and snow cover can affect actual survival, but the zone is a practical guideline for winter hardiness.