Phosphorous is one of the most important nutrients required by plants, aiding in root growth among other aspects of plant development! Soft rock phosphate, aka colloidal phosphate, comes from clay collected from basins of former hard phosphate mining operations. The clay nature of this product means it does not leach out of the soil due to water, allowing it to better stay in place and remain accessible to plants. 

Application Rates:

• About 1 cup per tree dusted into backfill soil when planting. One bag has around 5 cups (2kg).
• Light Applications: Apply 3.2kg per 1,000 square feet, ¼ cup per plant, or 0.45kg per 20 foot row of vegetables. 
• Normal Applications: Apply 5.5kg per 1,000 square feet, 1/3 cup per plant, or 1kg per 20 foot row.
  

• Please Note: If you are adding phosphorous to your soil via fertilizers such as bone meal or soft rock phosphate and also using the Root Rescue mycorrhizal inoculant, reduce the application rate of the phosphorous source by 1/4-1/2. Too much phosphorous will negatively impact the mycorrhizal fungi, potentially slowing or even preventing your plants from forming a relationship with these incredible fungi.