An investigation was conducted in the field during the 2019/2020 and 2020/2021 seasons at the El Kanater Hort. Res. Station in the El Kaloubia Governorate, Egypt, to examine the impact of irrigation using normal water, magnetized water at 100%, 80%, and 60% of potential evapotranspiration, under biofertilizer with a combination of PGPR strains (Pseudomonas aeruginosa and Burkholderia hytofirmonas), and their collaborative interactions on the yield and water-use efficiency of garlic. variety Sides 40. Split plot design was used in the experiment, with three repetitions. The main plots were used for the watering treatments, and sub-plots were focused on biofertilizers. The best vegetative growth, total yield ton/fed, average clove weight, number of cloves per head, bulb ratio, and water productivity were observed in garlic plants that were irrigated with magnetic water at 100 and 80 percent ETc.. High growth, yield, and superior attributes were found in garlic bulbs treated with biofertilizers. Watering with either 100% or 80% ETc magnetized water plus biofertilizer provided excellent growth, yield, its constituent parts, and water utilization efficiency. Also, garlic bulbs that received both biofertilizer and 60% ETc magnetic water irrigation exhibited the least amount of weight loss after seven months. To optimize garlic bulb productivity and quality while reducing water usage by 20%, it is suggested to combine biofertilizers with 80% ETc magnetic water.