Chard or Swiss chard (Beta vulgaris subsp. vulgaris, Cicla-Group and Flavescens-Group) is a green leafy vegetable. The leaf blade can be green or reddish in color; the leaf stalks are usually white, or a colorful yellow or red.
Chard, like other green leafy vegetables, has highly nutritious leaves, making it a popular component of healthy diets. Chard has been used in cooking for centuries, but because of its similarity to beets and vegetables such as cardoon, the common names that cooks and cultures have used for chard may be confusing; it has many common names, such as silver beet, perpetual spinach, beet spinach, seakale beet, or leaf beet. Chard is a biennial. Clusters of chard seeds are usually sown, in the Northern Hemisphere, between June and October, depending on the desired harvesting period. Chard can be harvested while the leaves are young and tender, or after maturity when they are larger and have slightly tougher stems. Harvesting is a continuous process, as most species of chard produce three or more crops.