On the other hand, varieties labeled "OP" (short for open-pollinated) will grow true to variety name from seeds produced by the plants that you grow yourself. These seeds may be saved and will produce the same plant in future sowings as long as proper seed-saving procedures are followed.

The most obvious benefit to using open-pollinated seeds is the option to produce one's own seed supply. Some crops, including beans, peas, tomatoes, and lettuce, are self-pollinating, and thus do not even require much isolation for seed saving.

Popular examples of open-pollinated plants include heirloom tomatoes, beans, peas, and many other garden vegetables.