Generally
Store spinach in the refrigerator to keep it fresh and crisp. Avoid washing the leaves until you're ready to use them, as excess moisture can cause them to spoil more quickly. Gently dry the unwashed leaves if they're damp, then wrap them in a clean, dry towel. Place the wrapped spinach in a plastic bag or airtight container, and store it in the crisper drawer to maintain the right humidity and extend its shelf life.
Do not store with
Fruits, tomatoes and onions. Learn more about what not to store together.