Moringa oleifera plants were treated with four microorganisms (Azotobacter sp, Bacillus subtilis, Pseudomonas fluorescence and Trichoderma. harzianum. They used as bio-fertilizers in individual or in combinations inoculations to determine the growth and quality of such plant. The obtained results showed that treatment by microorganisms in combination is the best choice in improving of Moringa plant growth and its quality after 60 days of seeds planting, followed by Pseudomonas . fluorescence, T.S (fertilizer) and Azotobacter since they were 91.92, 86.00, 85.58 and 80.50 cm/plant respectively, whereas T. harzianum and B. subtilis, showed moderate effect in increasing of plant growth compared with the control. Treatments by bio-fertilizing microorganisms in combination exhibited highest values for both fresh and dry weights, N, P and K minerals percentage since they were (18.21 for fresh weight, 5.03 for dry weight, 4.50 N% 0.27 P% and 2.57 K%) compared with the individual treatments and control (untreated plants).