Growing Swiss Chard in a pot

Swiss chard is a low-maintenance vegetable once established, but consistent watering is crucial for tender, succulent leaves. Water regularly throughout the growing season, aiming to keep the soil evenly moist but not waterlogged. In dry spells, water deeply once or twice a week rather than little and often, directing water at the base of the plants to avoid wetting the foliage. Chard grown in clay soil will need less frequent watering than plants in lighter ground, but don't let the soil dry out completely or leaves will become tough and bitter. Feed plants in May and June with a balanced liquid fertiliser or apply a top-dressing of pelleted poultry manure to support vigorous leaf growth. Avoid high-nitrogen feeds later in the season, as these can encourage soft, sappy growth that's more vulnerable to pests and disease. A mulch of garden compost applied in early summer will help retain moisture, suppress weeds, and provide a slow release of nutrients. Chard is generally trouble-free, but watch for aphids on the undersides of leaves and leaf-mining flies, which create pale, winding tunnels in the foliage. Pinch out affected leaves promptly. Slugs and snails can damage young plants, so protect seedlings with barriers or organic pellets. Birds occasionally peck at the colourful stems; netting may be necessary if this becomes a problem. Chard is hardy to around -5°C and will often survive mild winters, particularly if given a fleece covering during hard frosts. In colder areas, plants may die back but can resprout in spring if the crown remains undamaged.