13-3-15, was designed for a pure water source like rainwater or reverse-osmosis (RO) purified water or water that has been treated for city use such as tap water. Due to the extreme variability of well-water mineral content, the RO Water Special formula is the preferred choice for the home grower. This was formulated from the nutritional program done at Michigan State University.

• Instantly feeds to grow bigger more beautiful plants vs unfed plants
• Well-fed plants are healthier more productive and more beautiful.
• Great for orchids all flowers vegetables trees shrubs and houseplants .Use on container or in ground plants.
• Makes one gallon liquid solution at 125 ppm N. Can be used 3/4tsp per gallon dry form or 1oz stock solution per gallon.

13-3-15 8Ca-2Mg (pure water orchid formula) — The original pure water formula is a high-quality compound fertilizer that combines macronutrients secondary nutrients.This version is formulated especially for those using Rain water, Reverse Osmosis water, or similar purified, low nutrient water source. Must be mixed with water.

Analysis Macronutrients: 13.0%
Total Nitrogen (Nitrate Nitrogen 12.5%, Ammoniacal Nitrogen 0.7%) 3%
Available Phosphate Acid (P2O5) 15.9%
Soluble Potash (K2O) 8.0%
Calcium (Ca) 2% Magnesium (Mg)
Derived from calcium nitrate, magnesium nitrate, potassium nitrate and monopotassium phosphate Micronutrients: 0.177%
Iron (Fe) 0.088%
Manganese (Mn) 0.044%
Zinc (Zn) 0.044%
Copper (Cu) 0.018%
Boron (B) 0.018%
Molybdenum (Mo) Derived from Iron EDTA, manganese sulfate, zinc sulfate, copper sulfate, boric acid, ammonium molybdate Notice: Granular fertilizers can start to liquefy in the bag due to contact with moisture/humidity.

This will vary depending on humidity and how often the container is opened. This does not mean the fertilizer has gone bad. You can still use in liquefied state.