What role does hardiness zone play in plant selection?

The hardiness zone is a critical factor in plant selection as it provides essential information about which plants can thrive in a particular climate based on temperature extremes. Each zone indicates the lowest average temperatures that a region typically experiences, helping gardeners and landscapers choose plants that are well-suited to survive the conditions of that area. This is especially important because even plants that are otherwise healthy may not tolerate extreme cold or heat, making hardiness zones a foundational element in ensuring successful plant growth and landscape sustainability. By understanding the hardiness zone, landscapers can create environments that foster plant health and vigor, avoiding costly mistakes associated with unsuitable plant choices.