Phosphorus is an essential nutrient for the transport of the energy created in photosynthesis. Many chemical sources of phosphorus either leach quickly out of the root zone or bind up in soil and become unavailable to the plant. They also negatively impact soil fungal populations.

Unlike many other phosphorus sources, HoloPhos works within the biological system to be available when plants need it, and to promote microbial activity rather than to shut it down. 

This product is not available in California.