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Magnetic water treatment and hydroponics system, as two distinct technologies, has shown remarkable results in enhancing crop growth and yield. The combination had somehow shown promising results; however, literature is still limited. This study determined the growth and yield performance of pechay as influenced by magnetic water treatment in a hydroponics system. Magnetization was done using a varying number of permanent magnets. Based on the result, a positive effect was observed for all the parameters considered. Notably, an increase of 24.7% in height, 30% in the number of leaves, 18.56% in leaf length, 47.93% in leaf area, 46.50% in root length, and 34.97% in fresh weight against the control. The results suggest that the application of magnetic fields on the nutrient solution in hydroponics systems could further enhance crop production and could be applied for practical use. Published by the International Journal of Agronomy and Agricultural Research | IJAAR