A flame retardant cellulosic-based nonwoven fabric is provided having a synergistic blend of cellulosic and acrylic fiber that imparts unexpectedly enhanced flame retardant performance. The flame retardant finished nonwoven fabric can have at least about 15 wt % and no greater than about 35 wt % acrylic fiber and at least about 65 wt % and no greater than about 85% cellulosic fiber, where the nonwoven fabric has a char strength of at least 0.9 Newtons and exhibits a basis weight loss of no more than 7 wt % when exposed to a gas flame for 240 seconds. Bedding articles including the flame retardant finished nonwoven fabric are also provided.