Details in this 90-minute webcast taught by Bill Kreuser, Ph.D., can help you maximize the benefits of plant growth regulators (PGR). Research on the use of growing degree days (GDDs) for precise scheduling of PGR applications on cool-season putting greens and bermudagrass fairways will be reviewed. Particular attention is paid to timing of PGR re-application with regard to growth suppression, green speed, stress tolerance and turfgrass nutrient requirements.