Rhubarb Swiss Chard Red Swiss chard has broad, wavy and wrinkled bronzed green leaves with contrasting crimson red leaf stalks. The ruby red stalks extend into red veins throughout the plant's leaves. Red Swiss chard's flavor profile shares the earthiness of a beet green with the salinity of spinach. The red stalks are fibrous, often bitter and succulent, as they carry the bulk of the plant's water content. Both the leaves and the stalk are edible.