This listing is for the MSU K-Lite blend which was developed as after the original blend was released and caused quite a stir in the orchid world as it was just so different from what we have been using for decades. This formula has Calcium and Magnesium apart of its formula, something we added to our plants for many years as supplement before discovering MSU, but now no longer need to as it’s included. I would strongly recommend you read up on how they came up with this formula, its a fascinating read and makes a lot of sense, here is the condensed version in a nutshell: The K-Lite fertilizer formula (12-1-1-10Ca-3Mg) was developed in response to studies suggesting excessive potassium, whether applied, obtained from, or accumulated in growing media can have a negative impact on the health of plants, especially in the absence of adequate calcium and magnesium levels. Some key data which was used to develop this formula is as follows:- Tissue data analysis from wild collected plants showed that calcium (Ca), and magnesium (Mg) concentrations were often greater than that of potassium (K), yet most fertilizers have it the other way around. – Epiphytic plant tissue and leaf litter analysis revealed that K is relatively uncommon (compared to Ca and Mg) in the tropical rainforest environment, and epiphytes are well adapted for efficiently extracting the very small amount of K which may be available. It has been suggested that such an adaptation may leave some epiphytic species unable to regulate K at the higher concentrations available in fertilizer, or naturally occurring in organic media components like fir bark or coconut husk products.This listing is for 100% Greencare MSU Fertilizer 12-1-1-10Ca-3Mg formula with no fillers or additives. Product will be shipped in a resealable bag with a measuring scoop and directions. If you dont need the fancy bag, we do also sell this product in our store in a plain sealed bag. Guaranteed Analysis Nitrate Nitrogen (N) 12.0% Ammoniacal Nitrogen 11.4% Urea Nitrogen 0.6% Phosphorus (P2O5) 1.0% Potassium (K2O) 1.0% Calcium (Ca) 10.0% Water Soluble Magnesium (Mg) 3.0% Boron (Soluble) 0.025% Copper (Soluble) 0.038% Iron (Chelated Fe) 0.155% Manganese (Soluble Mn) 0.077% Molybdenum 0.015% Zinc (Soluble Zn) 0.077% Derived from: ammonium phosphate, boric acid, calcium nitrate, copper sulphate, iron EDTA, magnesium nitrate, manganese sulfate, potassium nitrate, sodium molybdate and zinc sulfate. WARNING: The product contains Molybdenum (Mo) and may be harmful to ruminant animals foraging on grass where applications have been made. Mix 3/4 tsp. per gallon of water once a week for optimal results. Do not exceed recommended dosage. Can be applied as a root drench or foliar spray. Store in an airtight container after opening in a cool dry place. Keep out of reach of children & pets.