Growing Masterwort 'Roma' in a pot

Astrantia major 'Roma' has moderate water needs and dislikes drying out, especially during the growing and flowering season. Water regularly from spring through summer, particularly during dry spells; aim to keep the soil consistently moist but not saturated. In partial shade or heavy clay, natural rainfall may be sufficient, but in sunnier spots or free-draining loam, check weekly and water deeply if the top few centimetres of soil feel dry. Reduce watering in autumn and winter when the plant is dormant. Feed in March or April as new growth appears. Apply a balanced general-purpose fertiliser such as blood, fish and bone or pelleted chicken manure around the base of the plant, following packet rates. Alternatively, top-dress with a 3–5 cm layer of well-rotted compost or manure, which feeds the soil and helps retain moisture. A second, lighter feed in late spring can boost flowering, but avoid overfeeding, which encourages soft, leafy growth at the expense of flowers. Astrantia major 'Roma' is fully hardy in zones 4–8 and needs no winter protection in temperate Europe. Mulch around the crown in autumn to conserve moisture and suppress weeds, but keep mulch clear of the crown itself to prevent rot. Pests are rarely a problem, though slugs and snails may damage young shoots in spring; use organic pellets, barriers, or hand-picking if necessary. Powdery mildew can occur in dry conditions or overcrowded clumps, showing as white patches on leaves. Improve air circulation, water at the base rather than overhead, and remove affected foliage promptly. Overall, 'Roma' is a low-maintenance perennial that rewards consistent moisture and an annual tidy with months of elegant, long-lasting flowers.