The present investigation was carried out at Vegetable Experimental Farm, Division of Vegetable Science & Floriculture, Sher-e-Kashmir University of Agricultural Sciences and Technology, Chatha during 2013-14 and 2014-15 to assess the performance of brinjal genotypes across seasons and years for their adaptability under wide range of environments through phenotypic stability studies using Eberhart and Russel regression model. Twenty five brinjal genotypes were evaluated for yield and its components under six environments comprising of six different seasons viz., E1 : Autumn-winter 2013; E2 : Spring-summer, 2014; E3 : Rainy, 2014; E4 : Autumn-winter, 2014; E5 : Spring-summer, 2015 and E6 : Rainy, 2015. The partitioning of environments + (genotypes x environments) mean squares showed that environments (linear) differed significantly and were quite diverse with regards to their effect on the performance of the genotypes for fruit yield and its related quantitative traits. The results revealed Pusa Ankur and Arka Shirish as stable genotypes for early maturity and late maturity, respectively. Two genotypes viz., Shamli and Punjab Sadabahar were identified as stable for fruit yield per plant whereas, genotype PPL-74 was found stable for average fruit weight and fruit yield per hectare and thus can be recommended for commercial cultivation under subtropical conditions of Jammu region.