Certified Chemical Free is term used to classify foods, mostly grains, that have been produced in a chemical free environment. Although, unlike organic products, “chemical free” farmers are not limited in the types of fertilizers that can be used on their crops. Natural fertilizers can be used such as nitrogen, phosphorous, and potassium, and still result in a chemical free product if applied at the right time during the growing season. Certified Chemical Free products are tested regularly to make sure they are and remain chemical free.

Source: Wheat Montana Farms