Unlike other vegetables our microgreens are never exposed to chemicals of any kind. Our seed stocks are GMO free and untreated, the seeds are not grown in soil but on special non chemical grow pads. The microgreens grow on filtered water and light. These microgreens are delivered still alive and living on their grow pad, they will still be fresh for a few days after delivery. As they continue to live until you use them their taste is as fresh and crisp as possible. Our Microgreens are Pure.