What is the difference between K-Mag Granular and K-Mag Premium?
Both products are totally water-soluble, typically have less than two percent chloride, do not affect the soil pH and are blend sized. K-Mag Granular is a natural crystalline mineral which has an SGN of 240 and a UI of 30. K-Mag Premium is a very uniform sized granulated product with an SGN of 247 and a UI of 45.