A field experiment was conducted for three consecutive seasons comprising two wet (WS) and one dry season (DS) at the Agricultural Research Station, Mannuthy, Kerala Agricultural University (KAU), Thrissur to evaluate the efficacy of slow release fertilizer formulations in rice. The fertilizer formulations were adjusted to provide 90 kg N, 45 kg P₂O₅ and 45 kg K₂O ha^-1. Significant and maximum increase in crop yield parameters, yield, nutrient uptake and nutrient use efficiency were observed with a mixture comprising of Factomphos, Urea, muriate of potash (MOP) with Gypsum as physical barrier and neem cake as nitrification inhibitor and a spike formulation comprising of Factomphos, Ammonium sulphate, MOP with Gypsum and neem cake as filler and binder respectively in the first crop during wet season. However, during the dry season, the recommended package of practice (POP) of KAU, which envisages normal split applications of straight fertilizers, has taken a significant lead. The slow release fertilizer formulations were observed to be more effective than straight fertilizers in wet season. The residual effect on yield and yield attributes were small in the third crop. Though, they performed exceedingly well when compared to control.