Technical Abstract: Ammonium nitrate is no longer available for agricultural fertilizer use due to national security concerns. The lack of availability of this fertilizer has created a need for alternative nitrogen sources for commercial grass seed production. This study evaluated alternative forms of nitrogen fertilizer for Kentucky bluegrass seed production utilizing different cultivars produced at different locations. Nitrate, ammonium and urea forms of nitrogen fertilizers were evaluated for their impact on seed yield and plant development. Alternative sources including calcium nitrate and ammonium sulfate provided seed yields equivalent to those produced by ammonium sulfate. Enhanced ammonium fertilizers had the additional benefit of reduced leaching.