Grow this gorgeous chard for fantastic colour! Celebration Swiss chard produces thick red, yellow, rose, gold, and white stems that bear slightly savoyed leaves of burgundy and green. The colours are richest at full maturity, so give it some time to deliver the rainbow effect. The immature leaves are tender and excellent in salads, while the cooked mature leaves and stalks have a flavour that is milder than cooked spinach, and packed with nutrients.