Spinach , Chenopodiaceae spinach is an annual or biennial herb. Also known as spinach and Persian grass. It is eaten with leaves and tender stems. It is native to Persia and has been cultivated before 2000. Later spread to North Africa, from the Moors to Western Europe, Spain and other countries. Spinach was introduced into the Tang Dynasty in 647. Spinach has developed main roots and red fleshy roots, sweet and edible. Spinach is a cold-resistant vegetable and a long-day plant. There are also spinach that is sown in winter and harvested in spring in northern China, commonly known as immersed spinach. It can be drilled or broadcasted. The main diseases of spinach are downy mildew, virus disease, and anthracnose. The main pests are aphids and leaf miners.