Down To Earth's Langbeinite supplies three vital plant nutrients and is OMRI listed! The five-pound box of all-natural fertilizer has a 0-0-22 formula and is listed by the Organic Materials Review Institute (OMRI) for use in organic production. Langbeinite is a naturally mined crystalline mineral that supplies the water-soluble sulfate form of vital plant nutrients. The maximum chlorine content is less than 3.0 percent, minimizing the potential for fertilizer burn, and it has a neutral pH. It is widely used on sensitive vegetables and fruit crops that require high fertilization rates but do not tolerate high levels of chlorine or soluble salts. This standard-grade langbeinite has a typical SGN of 95 and is an excellent source of readily available sulfur, potassium, and magnesium. Down To Earth's Langbeinite 0-0-22 is a naturally mined crystalline mineral that supplies the water-soluble sulfate form of three vital plant nutrients: potassium, magnesium, and sulfur. Its maximum chlorine content is less than 3.0 percent.