<p>This work was directed to evaluate the lulo´s (Solanum quitoense Lam. var. septentrionale) physiologic answer. They were used three treatments with organic fertilization (bocashi, bocashi + biol mix and biol), and a forth one with chemical synthesis (18-18-18), using the description of physical and physiological variables to establish the plant´s optimum development and growth during three time-intervals. Three sampling were made at various physiological stages of the plant selecting a plant for each plot. The physical analyzed variables were dry biomass foliar area, and the physiological variables were index of foliar area, growth rate, relative growth rate and net assimilation rate. It was used a design of full blocks at random with variance analysis and proof of Duncan. The results in dry mass were highly significant, whereas in the physiological variables there were no differences. In all treatments the best response was given by the implementation of chemical synthesis fertilizer, followed by the mixture of bocashi + bioll, which was the most economical.</p>