Wheatgrass Research - Charles Schnabel and other scientists began studying wheatgrass in 1932. They determined te best climate, location, soils and stage of growth for highest nutritional density. THey developed equipment to dry the wheatgrass at low tempuratures. Pines follows these growing, harvesting, drying and packaging standards established by Dr.Schnabel. Never Grown in Greenhouses or Trays. Pines Wheat Grass is grown in the same kind of glacial soils that produced the most nutritious wheatgrass in the research. It matures slowly, outdoors, during cold months. Freezing nighttime tepuratures and cold days converts months of full sunlight into nutritional density, while the plant remains a short grass.