Plant hardiness refers to a plant's ability to survive and thrive in specific environmental conditions, particularly temperature extremes. It is often measured using the USDA Plant Hardiness Zone Map, which divides regions into zones based on their average annual minimum temperatures. This helps gardeners and farmers select plants that are well-suited to their local climate. Understanding plant hardiness is crucial for successful gardening and landscaping. By choosing plants that match the hardiness zone of their area, individuals can ensure better growth, flowering, and overall health. This knowledge helps prevent the disappointment of planting species that cannot withstand local weather conditions.