A Seed Chat with Bill McDorman. – This is the May 2023 Seed Chat with Bill McDorman and Greg Peterson discussing a gardening concept that involves mixing seeds on purpose before planting with a goal of cross-pollination. A Grex is a mixture of varieties growing together and encouraged to cross-pollinate. The seeds from those crosses are grown out again and again. Instead of crossing two parents to create offspring, the breeder crosses dozens. The word Grex means ‘flock’.