The higher cost and increased pollution caused by the intensive use of fertilizers in growing vegetables necessitate the use of safer organic biostimulants to partially substitute fertilizers. Analyses of leaf extracts of Moringa oleifera and Moringa peregrina in the present study confirmed their rich content of diverse compounds and elements and indicated that, except for Mg and Ca, M. oleifera outyielded M. peregrina for the measured elements and bio-constituents. Foliar spraying of leaf extracts of M. oleifera and M. peregrina at (1:10, 1:20, and 1:30 extract: distilled water) was attempted on pepper plants under greenhouse conditions every two weeks for five times, starting 30 days after transplanting. Enhanced vegetative growth parameters (plant height, number of branches and leaves, plant fresh and dry weights, leaf area, and leaf chlorophyll content) and better yield attributes (fruit yield plant-1 and hectare-1) were obtained by foliar spraying of plants with the concentrated extract 1:10 of Moringa species. The vegetative growth of pepper plants was significantly influenced by extract concentration and moringa type concentration but not by moringa type (P 0.05). However, moringa type, extract concentration, and their interactions significantly affected pepper fruit yield plant-1, pepper fruit yield ha-1, and the mineral content of pepper leaves (P 0.05). Irrespective of moringa type, the highest extract concentration of 1:10 resulted in the highest yield per plant (1.68 kg) and yield per hectare (16.88 tons) of peppers. The present study highlighted the potential of using extracts of moringa trees in organic farming.