Soil characteristics and crop maturation are some of the most important factor that determined the engineering properties of agricultural products. In this study, the mechanical properties of plantain (Musa paradisiaca) fingers were determined under two soil treatment conditions and five maturity stages. The plantain plants were cultivated under two soil treatment methods, which were organic and inorganic treatments. The results revealed that soil condition had significant (P ≤0.05) effect on all the mechanical parameters investigated. The findings of the study revealed that the mechanical parameters of the organic produced plantain fingers were higher, when compared to the mechanical properties of fingers produced with inorganic soil treatment. The results further displayed that there were increment in the mechanical behaviours of the plantain fingers, as the maturation period increased from maturity stage 1 to maturity stage 3, before they started to decline to maturity stage, irrespective of the soil treatment applied. According to the results plantain fingers harvested matured but unripe (stage 3) can withstand the postharvest operations. Data obtain from this study will help engineers in designing and fabrication of systems for the mechanization of plantain production.