Phenotypic plasticity refers to the ability of genotypes to exhibit different phenotypes in response to environmental conditions. The AMMI model is often used to analyze this interaction in multienvironment trials. In a study involving six tomato genotypes grown in different environments, genotype L88 yielded the highest average at nearly 31 t/ha, while L27 and L53 had the lowest yields. The AMMI biplot indicated that genotypes L49 and L21 had strong interactions with the Pazardzhik environment, while L88 had a positive interaction with the Požega environment. The analysis concluded that AMMI is effective for assessing trait stability in multienvironment trials.