What if a soil test report recommends an unusual fertilizer grade like 15-0-14 or 8-0-24?
Soil high in phosphorus get this type of fertilizer recommendation. When the soil test phosphorus index is greater than 50, no phosphorus is recommended for lawn, garden or landscape samples. Grades 15-0-14 or 8-0-24 can be purchased from fertilizer dealers that cater to farmers. If you cannot find these materials at local garden centers, contact a regular fertilizer dealer who can assist you in blending the proper ratio or provide an appropriate substitute.