The promotion of agroecological approaches to fertilization include the use of liquid biofertilizers, which contribute to improving the income of producers but also to sustainably preserving the soil. It is with this in mind that this study specifically aimed to compare the effects of liquid biofertilization and chemical fertilization on vegetative growth and pepper production, with a view to establishing practical guidelines for market gardeners in Kinshasa/Mont-Amba. To achieve these objectives, a Randomized Complete Block device was installed with three treatments, namely the liquid biofertilizer Rapid Gro, the chemical fertilizer NPK 12-24-12 and the control without fertilizer in order to collect the data to be used for statistical analyzes to infer the necessary trends. At the end of the data analyses, the results showed that from the point of vegetative growth, the fertilizers used induced significant effects on shoot growth. The height obtained with the treated plants was greatly significant compared to that obtained with the untreated plants (except Rapid Gro). No statistical difference was obtained from the point of view of plant vigor. From a production point of view, the fertilizers used had significant effects on the yield components. Plots treated with Rapid Gro liquid biofertilizer showed significantly high production compared to plots treated with NPK 12-24-12 chemical fertilizers and those not treated in terms of average number of fruits per plot and average weight of fruits per plot.