what is heirlooms tomato means
An heirloom tomato (also called heritage tomato in the UK) is an open-pollinated (non-hybrid) heirloom cultivar of tomato.he hybrids often exhibit  hybrid vigor  in the first generation, but the second generation tends to exhibit many undesirable recessive traits. Heirloom tomato varieties are open pollinating, and cross-pollination is common without human intervention.