This study was initiated during 1999 /2000 and 2000 /2001 seasons to select the optimum rate of N, P and K through fertigation for Williams banana. Fifteen N : P : k ratios were applied.                 Results showed that there was great differences on growth aspects, yield and finger characteristics with varying N : P : K ratios. Since increasing N and K rates from 100 to 500 g /plant and P from 100 to 300 g /plant caused a remarkable promotion on all studied parameters. Meaningless promotion on all the tested characters was ascribed due to raising N and K from 400 to 500 g /plant and P from 200 to 300 g /plant.                 The best results with regard to growth, nutritional status of the plants, yield and fruit quality of Williams banana were obtained due to fertilizing the plants with N : P : K at 400 : 200 : 400 g /plant via fertigation (at 14 equal batches for N and four equal batches for both K and P).