This document discusses weed management in alfalfa. Weeds can reduce alfalfa establishment, yield, and forage quality. The critical period for weed removal is 3-5 weeks after planting. Herbicides like Pursuit and Raptor can be used during establishment with some potential yield loss. Roundup Ready alfalfa allows post-emergence glyphosate applications with more flexible timing but has higher seed and technology costs. Weed management is important to secure stand establishment and provide high quality forage, especially in the first cutting. Management options depend on weed species, density, and field conditions.