US Greens produces the highest quality, certified-organic cereal grasses and alfalfa in the world today. What makes them the best? Our location and soil, our cultivation techniques, our production facilities, and quality control at every step lead to the best powdered greens available. Our greens have exceptional nutritional content, and are certified organic, kosher, and gluten-free. Kansas Grown Our grasses are field grown in Kansas, USA, in the planet’s best soil and climate for growing the finest quality greens. Research by soil scientists tells us that the central plains of the United States have deep, rich top soil with mineral deposits that produce some of the most fertile soils in the world.