Chia seeds are naturally grown as a mix of both black and white seeds. The black chia seeds defined by a veined or swirled coloring make up the majority of chia seeds grown today. White chia seeds are found in much lower percentages and are slightly larger than their black counterparts. In order to increase the percentage of white seeds harvested farmers have separated the seeds before planting as white seeds result in plants bearing more white seeds. Farmers use color separation to produce monochromatic seeds for planting but they could also use that same machine after harvest. Research has shown that historically white and black chia seeds were grown as separate crops but overtime the white chia production diminished and became mixed with the more commonly produced black chia seeds.