‘Amerishade' is a recently introduced St. Augustinegrass (Stenotaphrum secundatum [Walt.] Kuntze) cultivar. It has dwarf characteristics of small leaf blades, slow growth, and reported shade tolerance. ‘Floratam' is the standard St. Augustinegrass used in lawns and landscapes in Florida. The objective of this study was to evaluate the mowing frequency needed to maintain both grasses at acceptable landscape conditions under different nitrogen (N) regimes. The study was conducted at the G.C. Horn Turfgrass Field Laboratory in Gainesville, FL in 2002 and 2003. Nitrogen was applied four times throughout the growing season at annual application rates of 49, 196, or 392 kg ha-1. Amerishade and Floratam were mowed at 5.1 and 10.2 cm, respectively, every 7, 14, or 21 days with a rotary mower. Evaluations taken included turfgrass visual scores, multispectral reflectance, and root and shoot growth. Comparisons were made between grasses and within grasses at different treatment levels. Throughout the study, Amerishade produced from 8 to 57% less shoot tissue than Floratam. As mowing frequency decreased and N rate increased, both cultivars produced more shoot tissue. Amerishade had higher average quality scores at all mowing frequencies and N rates than Floratam. Even under high N levels, Amerishade could go approximately 16 days without mowing before quality became unacceptable.