This experiment was conducted at Abo Qurkas district, Minia Governorate during the two successive seasons of 2014 and 2015 to study the effect of compost and biostimulant treatments on chemical constituents and guaran productivity. The obtained results revealed that fertilizing guar plants with compost (2.5, 5.0 and 7.5 ton/fed) significantly increased guaran productivity (guaran % and guaran yield per plant and /fed), pigments (chl. a, b and carotenoids) and N, P , K, protein and total carbohydrates %. The medium level of compost (5.0 ton/fed) was much more effective than low and high level (2.5 and 7.5 ton/fed) in this concern. The plants treated with Vit. E  or plant extracts (garlic, moringa, aloe, green tea) resulted significantly increases in guaran productivity and some chemical constituents (pigments and N, P and K %) in both seasons, except green tea extract (300 ppm) for guaran productivity. Among such treatments, either garlic extract (300 ppm) or green tea extract (150 ppm) gave the best results. It could be recommended to fertilize guar plants with compost (5.0 ton/fed) and spraying plants with garlic extract (300 ppm) or green tea extract (150 ppm) to achieve the maximum yield of guaran.