INTRODUCTION In field trials in Thailand, Mulato II produced significantly more amounts of green leaf, particularly in the dry season, than other brachiaria grasses (Hare et al 2009). Cayman produced more dry matter than Mulato II in one wet season out of three wet seasons, and BRO2/1794 produced similar dry matter yields compared to Mulato II (Pizarro et al 2013). The objective of this field study was to determine the effect of varying cutting interval on growth and forage quality of hybrid brachiaria grasses in Thailand on low fertility soils.