Role in Plant Development

• Phosphorus is one of the three macronutrients essential to the healthy development of plants, playing a major role in the process of photosynthesis, which transforms solar energy into chemical energy. Phosphorus promotes proper plant maturation and allows growing plants to withstand stress. It is also encourages development of healthy blooms and root growth.
  
  

Sources

• Phosphorus is added to the soil either through organic means, such as animal manure, composts, bone meal and sewage sludge, or as phosphates in commercial fertilizer products. Rock phosphate is used to manufacture these fertilizers, and phosphate products commercially available include superphosphate, diammonium phosphate and polyphosphates.
  
  

Caution

• Follow all instructions carefully when using phosphate fertilizers because phosphate is a source of water pollution. Overfertilizing and spilling fertilizers onto driveways and pavements are common mistakes of gardeners. Rainwater carries wasted fertilizer into storm drains and eventually lakes and rivers.