To determine the accuracy of the Luster Leaf tests, we compared the results we got from the mail-in soil tests. The NPK results were close to the lab results. For an at-home test, we were pretty ...

To clear the air, a simple test called phosphate fixation capacity can indicate whether the soil requires phosphorus fertilisation every season. The argument by extension officers that the NPK ...

Fertilization of gardens and landscapes typically begins in April after soils have warmed. With fertilization, one size (or ...