|Subspecies||Beta vulgaris subsp. vulgaris|
|Cultivar group||Cicla Group, Flavescens Group|
|Origin||Sea beet (Beta vulgaris subsp. maritima)|
|Cultivar group members||Many; see text.|
Chard or Swiss chard (Beta vulgaris subsp. vulgaris, Cicla Group and Flavescens Group) (//) is a green leafy vegetable. In the cultivars of the Flavescens Group, the leaf stalks are large and often prepared separately from the leaf blade; the Cicla Group is the leafy spinach beet. 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 was first described in 1753 by Carl Linnaeus as Beta vulgaris var. cicla. Its taxonomic rank has changed many times, so it was treated as a subspecies, convariety, or variety of Beta vulgaris. (Some of the numerous synonyms are Beta vulgaris subsp. cicla (L.) W.D.J. Koch (Cicla Group), B. vulgaris subsp. cicla (L.) W.D.J. Koch var. cicla L., B. vulgaris var. cycla (L.) Ulrich, B. vulgaris subsp. vulgaris (Leaf Beet Group), B. vulgaris subsp. vulgaris (Spinach Beet Group), B. vulgaris subsp. cicla (L.) W.D.J. Koch (Flavescens Group), B. vulgaris subsp. cicla (L.) W.D.J. Koch var. flavescens (Lam.) DC., B. vulgaris L. subsp. vulgaris (Leaf Beet Group), B. vulgaris subsp. vulgaris (Swiss Chard Group)). The accepted name for all beet cultivars, like chard, sugar beet and beetroot, is Beta vulgaris subsp. vulgaris. They are cultivated descendants of the sea beet, Beta vulgaris subsp. maritima. Chard belongs to the chenopods, which are now mostly included in the family Amaranthaceae (sensu lato).
The two rankless cultivar groups for chard are the Cicla Group for the leafy spinach beet, and the Flavescens Group for the stalky Swiss chard.
The origin of the adjective "Swiss" is unclear, since this coastal plant is not native to Switzerland. Some attribute the name to it having been first described by a Swiss botanist, either Gaspard Bauhin  or Karl Koch (although the latter was German, not Swiss). Chard is used in traditional Swiss cuisine, however, namely in a dish called capuns from the canton of Grisons.
Growth and harvesting
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. Raw chard is extremely perishable.
|Nutritional value per 100 g (3.5 oz)|
|Energy||84 kJ (20 kcal)|
|Dietary fiber||2.1 g|
|Vitamin A equiv.|
|Vitamin A||6124 IU|
|Pantothenic acid (B5)|
|†Percentages are roughly approximated using US recommendations for adults.|
Cultivars of chard include green forms, such as 'Lucullus' and 'Fordhook Giant', as well as red-ribbed forms such as 'Ruby Chard' and 'Rhubarb Chard'. The red-ribbed forms are attractive in the garden, but as a general rule, the older green forms tend to outproduce the colorful hybrids. 'Rainbow Chard' is a mix of colored varieties that is often mistaken for a variety unto itself.
Chard is a spring harvest plant. In the Northern Hemisphere, chard is typically ready to harvest as early as April and lasts through May. It is one of the hardier leafy greens, with a harvest season typically lasting longer than kale, spinach, or baby greens. When daytime temperatures start regularly to attain 30 °C (86 °F), the harvest season is coming to an end.
Fresh chard can be used raw in salads, stirfries, soups or omelets. The raw leaves can be used like a tortilla wrap. Chard leaves and stalks are typically boiled or sautéed; the bitterness fades with cooking.
In a 100-gram (3.5 oz) serving, raw Swiss chard provides 84 kilojoules (20 kcal) of food energy and has rich content (> 19% of the Daily Value, DV) of vitamins A, K, and C, with 122%, 1,038%, and 50%, respectively, of the DV. Also having significant content in raw chard are vitamin E and the dietary minerals, magnesium, manganese, iron, and potassium. Raw chard has low content of carbohydrates, protein, fat, and dietary fiber.
When chard is boiled, vitamin and mineral contents are reduced compared to raw chard, but still supply significant proportions of the DV (table).
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- Chard, Centre for Urban Education about Sustainable Agriculture
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