Turfgrass systems can be an important source or sink for greenhouse gases (GHG), including carbon dioxide (CO 2 ), nitrous oxide (N 2 O), and methane (CH 4 ). Further research is required in turfgrass systems; therefore, our objectives were to evaluate the effects of turfgrass species, growth rate, clipping management, and environmental conditions on GHG emissions. Greenhouse gas fluxes were measured in two separate field experiments in West Lafayette, IN. Experiment 1 investigated GHG flux in three cool-season (C 3 ) and two warm-season (C 4 ) turfgrass species during two growing seasons. Experiment 2 investigated fluxes in two C 3 cultivars with varying growth rates and under different clipping management regimes. The C 3 turfgrasses had the highest mean CO 2 flux rates ranging from 0.373 to 0.431 g CO 2 -C m −2 h −1 compared with 0.273 to 0.361 g CO 2 -C m −2 h −1 for C 4 turfgrasses. Mean hourly N 2 O flux rates ranged from 43.3 to 50.9 μg N 2 O-N m −2 h −1 for C 3 compared with 11.1 to 14.4 μg N 2 O-N m −2 h −1 for C 4 turfgrasses. Methane flux was more variable across time, but overall C 4 turfgrasses were more likely to be a CH 4 source, whereas C 3 turfgrasses were often a CH 4 sink. Growth rate and grass clipping management treatments had negligible impact on measured GHG flux. The differences in management practices specific to C 3 and C 4 turfgrasses had the largest impact on GHG flux.Results indicate the impact and importance of turfgrass species selection on GHG flux and also provide more information on our overall understanding on carbon and nitrogen cycling in urban soils.