Open-pollinated (OP) seeds can reproduce themselves entirely true to their type. This type of seed is great it can be harvested and planted perpetually and maintain the same characteristics each planting season.
Seeds from open-pollinated varieties produce plants and fruit that are identical to their parent.
Note: All heirloom varieties are open-pollinated, but not all open-pollinated varieties are heirloom varieties.
An open-pollinated plant is pollinated by the wind or by insects and will display lots of genetic variation.