This bulletin presents the results of the analysis of 2,623 official samples of commercial fertilizer taken during the period of July 1, 2016 through June 30, 2017 by the field inspection staff. The samples represented approximately 55,241 tons of fertilizer out of the approximately 1,046,305 tons sold during this period. The Laboratory made 2,237 nitrogen, 1,797 phosphorus, 1,938 potassium, and 982 secondary and minor element and certain other analyses on these samples. Table 1 shows the manufacturers whose product the field inspection staff sampled, along with the number of samples taken and the percentage of those samples that passed. Table 2 shows the detailed N, P2O5, and K2O analyses of samples of mixed fertilizers and fertilizer materials. Table 3 contains the results of secondary and minor element and certain other analyses. Table 4 is a listing of companies or licensees registered or licensed to sell fertilizer in Kentucky as of June 30, 2017.