This research report tested liquid Fiesta at varying concentrations and rates to determine application efficacy as well as safety for turfgrass at the Guelph Turfgrass Institute (GTI). It was found that Fiesta significantly reduced dandelion, clover, and black medic populations, providing close to 100% control following the second treatment application. Lower concentrations of Fiesta performed similarly to higher concentrations. No significant turf loss from phytotoxicity was observed in the experiment.