Last fall we planted oats and hairy vetch as a cover crop. Traditionally they're cut and turned into the soil to add organic matter and nitrogen/carbon. We did cut most of it down but because we aren't tilling we just left it on the soil surface (often called ). What didn't get chopped, or grew back, is now producing seed and bringing bees to the garden. The reseed means we won't have to buy cover crop this fall and instead we will have this amazing ever-evolving patch of volunteer plants that contribute to an amazing ecosystem.