Spinach is a very rich plant, full of vitamins and minerals that are good for human health Spinach seeds are more interested in cool climates and need a lot of irrigation and the soil should always be moist. Spinach seeds should be planted at a depth of 5 to 12 cm above the soil surface And the best time to harvest is when the height of the spinach has reached 10 to 15 cm (it must be harvested before flowering)