In the mid-Atlantic region, forest managers routinely use glyphosate and sulfometuron methyl (Oust® XP) containing herbicides to favor regeneration of desired species composition in mixed hardwood forests where hayscented and New York ferns, striped maple, and American beech are preventing desired seedling establishment and growth. Managers want to use as little herbicide as they can while still achieving control of interfering plants. Prior Oust® research was limited geographically, and effects of surfactant choice with glyphosate were previously undocumented. Forest Service scientists at the agency’s Northern Research Station conducted two experiments in cooperation with the Pennsylvania Department of Conservation and Natural Resources Bureau of Forestry, one to test Oust® rate and timing over a broader geographic area, and another to evaluate striped maple and American beech control with various surfactants added to glyphosate. In the Oust® experiment, results suggest that 2 oz Oust® per acre in 25 gallons of water without a surfactant resulted in nearly complete control of ferns with minimal impact on seedlings. Research found that surfactant choice matters most for striped maple control. Roundup® Pro Max, which contains a proprietary surfactant, was most successful followed by glyphosate plus Kingpin® surfactant. American beech under 15 feet was 90 percent controlled with glyphosate and most surfactants.