Black Oil Sunflowers will no longer be sorted by seed size. We have previously offered Black Oil Sunflowers in large and small seed options, but we will be moving forward with a single option for Black Oil Sunflower Seeds. There is no genetic difference between large and small seeds. The seeds had simply been sorted into two categories based on their physical size. A single sunflower can produce seeds in varying sizes with the same genetics. We are making this change because it is often difficult or impossible to maintain a supply of only small seeds reliably. By not sorting the seed by size, we will be able to more reliably supply the Black Oil Sunflower seed variety to those who regularly grow and sell these microgreens.