Proper nitrogen management is more important for cotton than for most other major field crops. Ultra narrow row (UNR) production systems may alter N uptake and use efficiencies relative to conventional and narrow row spacings. A study was conducted to evaluate the effects of four nitrogen rates (0, 50, 100 and 150 lbs N per acre) and two row spacings (7.5 and 38 inches) on cotton growth and production. Plant height was significantly affected by row spacing and N rate. Plants were consistently shorter in 7.5-inch rows compared to those in 38-inch rows from pinhead square through maturity. Neither row spacing nor N rate affected cotton lint yield, with average yields totaling approximately 338 lbs lint per acre. Consistent with previous research findings, plants in 7.5-inch rows set a higher percentage of bolls on fruiting branches 6 through 10 compared to plants in conventional, 38-inch rows.