This paper titled "Evaluation of silicon doses on the performance of hybrid cucumber (Cucumis sativus L) variety STONEWALL F1, Lamas - San Martin" aimed to determine the optimal dose of silicon foliar application in hybrid cucumber variety STONEWALL F1 and perform economic analysis of the treatments under study, for which we evaluated 4 treatments: T0 (no application), T1 (1.2 l/ha), T2 (1.8 l/ha) and T3 (2.4 l/ha). The parameters evaluated were: percentage of emergence, plant height, number of fruits produced per plant, number of fruit set per plant, fruit length, fruit diameter, fruit weight, yield t/ha, and finally conducted an economic analysis of all treatments studied. The major findings were: T3 treatment (2.4 Liters of Silicon x ha-1), was the one who threw the biggest and best average values of productivity indicators being these of 64.96 fruits per plant, fruit set per plant 12...