What is the growth retardant used for grass on the golf course?

The growth retardant commonly used on Golf course grass is called paclobutrazol. It works by inhibiting the gibberellin biOSynthesis pathway, which helps to control vertical growth while promoting denser turf. This allows for a more manicured appearance and reduces the frequency of mowing. Other growth regulators, like trinexapac-ethyl, are also used to achieve similar effects.