Seed Saving: Cilantro Cilantro will bolt and go to seed very early. Pull and compost those early on plants that bolt, don't save seed from them. Cilantro will cross pollinate with other varieties of cilantro and must be seperated by 1/2 mile. Seeds can be harvested when they are dry on the plant. Last year I got over 1,000 seeds from 33 plants. Store in a paper bag in a glass jar kept in a cool, dry dark place tenzicut