Two greenhouses experiment were conducted in Qalin Center, Kafr El-Sheikh Governorate, Egypt under the natural conditions of greenhouse during the two growing winter seasons of 2020/21 and 2021/22. The experiment aims to evaluate the effect of two magneto-priming seed treatments (Un-magnetized seeds (U-MS) and magnetized seeds (MS), two magnetized saline water (Un magnetized saline water (U-MW) and magnetized saline water (MW) under two levels of NPK fertilizer (75 and 100% of recommended rate) on seedling emergence, vegetative growth and productivity of spinach plants. The eight treatments laid out in completely randomized design (CRD) with three replications. Results show that sowing magnetized spinach seeds and irrigation pots with magnetized saline water (2500 ppm) under both NPK fertilizer significantly out performed sowing un-magnetized spinach seeds and irrigated with un-magnetized water for all tested vegetative growth parameters at the age of 15, 30, 45, and 55 days.