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Heirloom vegetables are historic varieties that have been commonly grown in the "olden days". Some say a vegetable variety must be 100 years old to qualify, while others define an heirloom as only 50 years old. Others use the year 1945, which marks the beginning of industrialized agriculture and the introduction of hybrid varieties. Regardless of the date of origination, a true heirloom vegetable is always open pollinated and has been cultivated and bred using classic breeding practices. The major attraction of heirloom vegetables is that they are high quality and easy to grow.