NPK Values for Nutrients
As you create your own nutrient program, it is often helpful to know the NPK (nitrogen-phosphorus-potassium) value for different fertilizer components. Follow these links for the NPK values of these organic fertilizers: bat guano, more animal manure options, bone meal and blood meal, worm castings.
| NPK Value | Component Name | Fertilizer Type |
| 15-00-00 | Calcium nitrate | Synthetic |
| 21-00-00 | Ammonium sulfate | Synthetic |
| 30-00-00 to 40-00-00 | Sulfur-coated urea | Synthetic, Slow Release |
| 31-00-00 | Isobutylidene diurea | Synthetic, (~90% slow release) |
| 33-00-00 to 34-00-00 | Ammonium nitrate | Synthetic |
| 35-00-00 | Ureaform | Synthetic, (~85% slow release) |
| 40-00-00 | Methylene ureas | Synthetic, (~70% slow release) |
| 46-00-00 | Urea (U-46) | Synthetic |
| 82-00-00 | Anhydrous ammonia | Synthetic |
| 10-34-00 to 11-37-00 | Ammonium polyphosphate | Synthetic |
| 11-48-00 to 11-55-00 | Monoammonium phosphate | Synthetic |
| 18-46-00 to 21-54-00 | Diammonium phosphate | Synthetic |
| 13-00-44 | Potassium nitrate | Synthetic |
| 00-17-00 to 00-22-00 | Superphosphate | Synthetic |
| 00-44-00 to 00-52-00 | Triple superphosphate | Synthetic |
| 00-00-22 | Potassium magnesium sulfate (K-mag) | Synthetic |
| 11-08-02 to 16-12-03 | Bird Guano | Mined Mineral |
| 00-3-00 to 00-8-00 (00-34-00 when soluble) | Raw Phosphate Rock | Mined Mineral |
| 00-00-60 | Potassium chloride | Mined Mineral |
| 00-00-19 | Kainite | Mined Mineral |
| 00-00-17 | Carnallite | Mined Mineral |
| 09-00-00 | Manure, Dairy |
Biosolid |
| 01-00-01 | Manure, Horse | Biosolid |
| 03-02-02 | Manure, Poultry | Biosolid |
| 04-12-00 | Bone Meal | Biosolid |
| 05-05-06 | Fish Blood and Bone | Biosolid |
| 06-02-00 | Milorganite | Biosolid |
Adapted from: Labeling of Fertilizer