Spinach is one of a variety of leafy greens. It is often found fresh or frozen.
Baby spinach is picked younger so it is more tender and lighter in flavor which is better for use fresh in salads where mature spinach is better used for cooked dishes.
To avoid waste and improve convenience, blanch fresh spinach then squeeze it in a tea towel to thoroughly drain extra liquid from it. Once the spinach is dry, place portions on a baking sheet or in a large ice cube tray then freeze, bagging once completely frozen. Frozen spinach can be quickly thawed for use in many kinds of cooked dishes including soups, stews, sautees, etc. By blanching and freezing it, the spinach takes up much less space while also avoiding the waste of having it go bad by leaving it in the refrigerator.