Source of phosphorous, calcium, silicas and trace minerals.
available sizes: 5 lbs, 25 lbs
density: 0.64 lbs per cup
release time: 0-2 years
Derived from untreated colloidal rock phosphate
For all plants.
Application Rates – always mix into soil
Roses, flowers, large plants and shrubs: 1 cup per plant early in season (or at planting).
Vegetable gardens/beds: 10 lbs per 100 square feet, per month.
Containers: 2 tablespoons per gallon of soil at planting.
Trees: 2 lbs per 2″ of trunk diameter.
See ‘Plant feeding requirements‘ if you are using rock phosphate in combination with other products or for more information.
See ‘Feeding with organics‘ for general information on using organic nutrients.