Abstract: Present studies were carried out to observe the effect of two types of fruit thinning (complete and partial) of the summer crop of guava on physico-chemical changes and leaf NPK status during winter crop. As a result of fruit thinning, the fruit quality of the winter crop got improved producing more sugars, TSS and ascorbic acid whereas acidity of the fruit was decreased. Fruit set, fruit size, fruit weight and organoleptic value were also found improved as compared to control. Flowers and fruits of thinned plants showed less drop than control. Leaves of treated plants possessed higher level of NPK. Complete thinning showed more promising results.