Rock Phosphate Fertilizer

Rock phosphate is a recommended organic fertilizer for adding phosphorus to your ?

Rock Phosphate Mining. Today, most of the phosphorus used in fertilizers for crops and lawns comes from rock phosphate that is mined in Florida. ... the naturally existing phosphorus is quite low across most of the samples. This has to do with how Florida was formed and the study of "plate tectonics." Lots of interesting reading here.