Perennial herbs are plants that live for more than two years, regrowing each season from their root systems. Unlike annual herbs, which complete their life cycle in one year, perennial herbs can provide fresh leaves and flavors year after year. Common examples include basil, thyme, and rosemary. These herbs are often valued for their culinary uses, medicinal properties, and ability to attract beneficial insects to gardens. They typically require less maintenance once established, making them a popular choice for home gardeners. Perennial herbs can thrive in various climates and soil types, contributing to biodiversity in ecosystems.