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[Beta vulgaris var. cicla] Seeds of a chard variety with wide, fleshy white stalks and crisp green leaves, great for both stalks and leaves.
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swiss chard is a chard variety grown mainly for its wide, fleshy white stalks, paired with glossy, crunchy green leaves. It is a versatile vegetable, valued in the kitchen both for the stalks, cooked separately as a side dish, and for the leaves, used like common leafy greens.
Botanically it is a Beta vulgaris var. cicla, part of the Amaranthaceae family (formerly Chenopodiaceae), the same as sugar beet and garden beet in general. The plant forms a rosette of large upright leaves, supported by wide, flat, fleshy stalks of whitish-green color, quite different from the thin leaves of leaf chard.
It is a biennial species grown as an annual, hardy and adaptable, able to tolerate both summer heat and the first autumn frosts well.
Sowing takes place from March to August, directly in the open field, placing 2-3 seeds per station at a distance of 35-40 cm along the row and the same between rows, at about 1.5-2 cm deep. Once the seedlings emerge and reach a manageable height, they should be thinned, leaving the most vigorous plant per station.
It prefers medium-textured, deep, well-drained soil rich in organic matter, with a pH between 6.5 and 7.5. Watering should be regular and abundant, especially in the hottest months, because water shortage makes the stalks fibrous and less tender.
Harvest usually begins 60-70 days after sowing, cutting the most developed outer leaves while the heart of the plant keeps producing new ones, allowing staggered harvests for several months.
It is good practice not to repeat the crop on the same plot for at least 2-3 years, alternating it with legumes, onions or cabbages. Light mulching helps keep the soil moist and control weeds between stations.
The main threats are Cercospora leaf spot, which causes circular leaf blotches, downy mildew and aphids, which colonize the underside of the youngest leaves. Good drainage, watering directed at the soil and crop rotation significantly reduce the risk.
The stalks and leaves are low in calories but rich in water, fiber and minerals, particularly potassium and magnesium, along with fair amounts of vitamin A and vitamin K. It is a vegetable traditionally recommended in light diets for its refreshing, easily digestible qualities.