Putting greens are routinely topdressed with sand to manage thatch, and smooth and firm the surface. This multi-year field study is designed to determine the topdressing requirements of three widely planted bentgrass cultivars; ‘Penncross’, ‘L-93’, and ‘A-4’, maintained at two nitrogen (N) levels (112 vs. 196 kg N ha^-1 yr^-1) on a sand-based rootzone. Plots are subjected to five topdressing/thatch management programs: no aerfication but heavily topdressed twice seasonally, twice annual aerification plus heavy topdressing to back-fill the holes using either a medium-coarse sand that matches the rootzone or a medium-fine sand, twice annual aerification with heavy topdressing using either sand size and topdressed weekly during active growth. Plots frequently topdressed with the finer sand held more (21.1 %) moisture at the 0-5.7 cm depth than those topdressed with a medium-coarse sand (19.0 %). The non-aerified plots produced a firmer surface (115 gmax) than aerified plots (103 gmax) as well as those receiving low N. Although low N produced a firmer surface, it also resulted in lower turfgrass quality (TQ) ratings compared to high N. Among cultivars ‘Penncross’ had lower TQ and a higher moss incidence, especially when frequently topdressed during the summer, than ‘L-93’ or ‘A-4’. However, during optimum growing conditions, all cultivars had a similar TQ. This research is ongoing and data regarding changes in rootzone physical properties, (e.g. particles size distribution, infiltration rate, and organic matter content) will be monitored. It is expected that these data will help recommend sand topdressing programs to meet varying quality expectations and desired management intensities.