What is an Heirloom Tomato or Vegetable?
An heirloom tomato is an open-pollinated (non-hybrid) cultivar of tomato . Open pollination is pollination by insects , birds , wind , or other natural mechanisms. The seeds of open-pollinated plants will produce new generations of those plants; however, because breeding is uncontrolled and the pollen (male parent) source is unknown, open pollination results in plants that vary widely in genetic traits, characteristics.