Spool quality is a factor of uniform growth, blade health, and presence of contamination. The grading guidelines may differ across regions and species, but the general rules remain the same. Both nurseries and farmers should put focus on high quality seed spools, and the line of communication between both parties should be honest. This guide has photos of spools of excellent, good, acceptable, and unacceptable quality along with descriptions of each to aid you in your spool grading. For an appropriate farm site, the quality of seed has the greatest impact on total yield.