Heirloom seeds are seeds that has been passed on from generation to generation. Organic Non Gmo seeds. Sustainable seeds, that will always grow true to type.
Heirloom” or “heritage” plants and livestock breeds are important to maintaining food resilience. ... The heritage breeds on the other hand are often more capable of withstanding diseases and environmental changes, qualities that may be important in the future.
Heirloom plants are most often thought of as old-time varieties of vegetables that come true from seed. That means that they're open-pollinated, so (assuming you don't plant other cultivars that could cross-pollinate nearby) you can save seed from your plants every year for the following year's garden.