Efficient irrigation programs on sand-based putting greens must be established to reduce water waste, minimize turf decline, and increase the effectiveness of cultural practices. The objective of the following study is to determine the minimum irrigation required to produce acceptable turf quality through the use of wetting agent applications and irrigation controlled by soil moisture sensors. An experimental area was established on a creeping bentgrass (Agrostis palustris Huds.) putting green built according to USGA recommendations. Four irrigation frequencies were established and controlled by soil moisture sensors based on critically low volumetric soil moisture contents (12, 10, 8, and 6 %). Each irrigation frequency treatment was split into two sub-plots, one of which received a monthly wetting agent application. Treatments were replicated four times in a randomized complete block design. Evaluations have included monthly cumulative irrigation and weekly ratings of turf quality and localized dry spot (LDS) formation. Average monthly water use for the high irrigation frequency treatment was 2.9, 6.1, and 11.1 times greater than the moderately high, moderately low, and low irrigation frequency treatments, respectively. In the 2004 growing season the high irrigation frequencies had the best turf quality and least LDS formation, regardless of wetting agent application. In the 2005 growing season the moderately high irrigation frequency treated with wetting agent had better quality than the high frequency irrigation treatments (with or without wetting agent application) due to firmer surface conditions. In 2005 all irrigation frequencies (except for high) that were treated with wetting agent showed acceptable and significantly better turf quality and less LDS formation compared to the non-treated. In conclusion, water use can be reduced significantly without sacrificing turf quality by utilizing wetting agents and controlling irrigation with soil moisture sensing technology.