This study has been conducted during two successive seasons (2021 & 2022) on 15 years old Aggazi shami and Picual Olive trees grown under soil salinity of 3.52 dSm^-1 and water salinity of 8.4 dSm^-1 in a private orchard located at Sarabium, Ismailia Governorate, Egypt. The main purpose of this investigation was to study the effect of spraying Boron (1 & 1.5 cm /L) and Potassium (1.5 & 3 cm/L) on olive buds' development, fruit characteristics and productivity. Trees were sprayed (twice), on January and repeated three weeks later. The obtained results showed a considerable variation in the morphological and anatomical characteristics of two Olive cultivars (Aggazi shami & Picual). The highest vegetative parameters (Shoot length, number of leaves/shoot) were recorded by Picual olive cultivar in both studied seasons and highest leaf length in the first season, without significant difference with those recorded by Aggazi Shami c.v in second one. While, Aggazi shami olive cultivar gave the higher most floral aspects (No. of flowers/inflorescence and sex ratio). On the other hand, the data of fruit characteristics and yield showed different trends. Whereas, Picual cv. achieved the highest significant values for fruit shape index and Aggazi shami olive cultivar recorded the highest yield/tree. Finally, it can be concluded that, treating olive cultivars (Aggazi Shami & Picual) with potassium 3 cm/l improved vegetative measurements, floral & fruiting aspects.