Heirloom seeds are seeds that have been passed down through generations, often for 50 years or more. They are typically open-pollinated, meaning they can reproduce true to type when planted, allowing gardeners to save seeds from their harvest for future planting. These seeds often come from traditional varieties that have unique flavors, colors, and characteristics. Growing heirloom plants can promote biodiversity and preserve genetic diversity in agriculture. Many gardeners choose heirloom seeds for their rich history and the ability to cultivate plants that are well-adapted to local growing conditions. Additionally, heirloom varieties often have better taste and nutritional value compared to some modern hybrids.