Fresh weed weights and yields were compared between Florunner peanuts (Arachis hypogaea L.) grown in twin 18 cm rows and conventional 91 cm rows when subjected to a series of weed control systems ranging from none to intense. Reductions in grasses in the twin row spacing were evident in 2 out of 3 years in the untreated check, where grass infestations were at a maximum. Comparable reductions in broadleaves, and increases in yield were sporatic. While the twin row spacing affected weeds and yield in a favorable manner, the consistency was insufficient to premit any reduction in herbicide inputs.