Existing bahiagrass (Paspalum notatum Flügge) cultivars have minimal cool-season production likely due in part to a daylength response. A new genotype is less sensitive to daylength and possesses greater cold tolerance, but its response to defoliation is unknown. The objective was to compare productivity and tillering behavior of a photoperiod insensitive, cold adapted (PICA) diploid genotype (Selection 4) to those of diploids ‘Pensacola’ and ‘Tifton 9’ and tetraploids ‘Argentine’ and ‘Tifton 7’. All were clipped every 7 or 21 d to 4- or 8-cm stubble heights (SH) during May-October 2005 and 2006. There was no stubble height effect but there was genotype X defoliation frequency interaction for total-season dry matter (DM) harvested. For the 21-d frequency, Argentine and Tifton 7 had greatest yields (12.8 and 12.7 Mg/ha), and Argentine (11.7 Mg/ha) was superior to all others for the 7-d treatment. PICA (10.4 Mg/ha) yielded less than all but Pensacola (10.7 Mg/ha) for the 21-d interval and was lowest yielding for the 7-d interval (7.8 Mg/ha). PICA yields were comparable to other genotypes early and late in the growing season but less during the warmest months. In Year 1, there were few differences among treatments in tiller appearance rate (TAR) and tiller death rate (TDR). During Year 2, TAR generally was greater for 4- than 8-cm SH and 7- than 21-d frequency. Cultivar rank for TAR was Pensacola > Argentine > Tifton 7, with PICA intermediate between Argentine and Tifton 7. Year 2 TDR varied less than TAR, with SH having more impact on TDR (4 > 8 cm) than the other treatments. In conclusion, PICA was generally lower yielding than other genotypes due to lesser production in summer, but TAR and TDR of PICA were generally within the ranges observed for the other genotypes.