MSU fertilizer was formulated at Michigan State University with the help of PhD Bill Argo of the Blackmore Company. The closest to nutritionally complete of any orchid fertilizer on the market.#

MSU 13-3-15-8Ca-2Mg for pure water (reverse osmosis and rain water)

Formulated for a regime of constant feeding.

Depending on you growing conditions a nitrogen PPM of 100 to 150 is a good starting point.  This will satisfy most nutrition requirements safely for growing in slightly less than ideal growing conditions i.e. lower light or temperature.

To achieve this a slightly heaping 1/2 teaspoon and a full teaspoon of MSU per gallon produced the following analysis:

.6 tsp

103 ppm - nitrogen

10  ppm - phosphorus

99  ppm - potassium

For a TDS of 177ppm per gallon.

 

1 tsp.

172 ppm - nitrogen

17  ppm - phosphorus

164 ppm - potassium

For a TDS of 353ppm per gallon.

If your growing conditions are ideal you may wish to MAX OUT your nutrition at 250ppm.

1.5 tsp. or MSU produce the following analysis:

257 ppm - nitrogen

26  ppm - phosphorus

126 ppm - potassium

For a TDS of 529ppm per gallon

MSU - Guaranteed Analysis

Nitrogen    (Nitrate 12.5%)

             (Ammoniacal 0.7%)      13.00%    

Phosphorus  (as P2O5)                3.00%    

Potassium   (as K2O)                15.00%    

Calcium                               8.00%    

Magnesium                             2.00%    

Iron                                  0.18%    

Manganese                             0.09%    

Sulfur                                0.09%    

Zinc                                  0.04%    

Copper                                0.04%    

Boron                                 0.02%    

Molybdenum                            0.02%    

                 

Components:  boric acid, calcium nitrate, copper sulfate, iron EDTA, magnesium nitrate, manganese sulfate, potassium nitrate, potassium phosphate, sodium molybdate, zinc sulfate.     

MSU 19-4-23 for tap water *(Ideal for the Northeast region Well or Municipal water supplies)

Depending on you growing conditions a nitrogen PPM of 100 to 150 is still a good starting point.  With this regime it is recommended to feed for 3 weeks, then flush with clean water on the fourth week.

To achieve this a 1/2 teaspoon of MSU per gallon produced the following analysis:

.5 tsp

125 ppm - nitrogen

12  ppm - phosphorus

126  ppm - potassium

For a TDS of 263ppm per gallon.

If your growing conditions are ideal you may wish to MAX OUT your nutrition at 250ppm.  1 teaspoon of MSU per gallon produced the following analysis:

1 tsp.

251 ppm - nitrogen

23  ppm - phosphorus

152 ppm - potassium

For a TDS of 526ppm per gallon

MSU - Guaranteed Analysis

Nitrogen    (Nitrate 13.6%)

             (Ammoniacal 5.7%)      13.00%    

Phosphorus  (as P2O5)                4.00%    

Potassium   (as K2O)                23.00%    

Iron                                 0.16%    

Manganese                             0.08%    

Sulfur                                0.08%    

Zinc                                  0.08%    

Copper                                0.08%    

Boron                                 0.02%    

Molybdenum                            0.02%    

                 

Components:  ammonium nitrate, ammonium phosphate, boric acid, copper sulfate, iron EDTA, manganese sulfate, potassium nitrate, potassium phosphate, sodium molybdate, zinc sulfate.

      *Check with your water company or test your local water supply for Ca and Mg levels. If it is low or you don't know, use MSU 13-3-15-8Ca-2Mg. The MSU 19-4-23 lacks the Ca/Mg. It was adjusted to the TDS of the local water supply in Michigan State. If you live in a state in that region it is probably safe to say you have similar hard water and can use the Tap Water (19-4-23) formula.