Growing Columbine 'Nora Barlow' in a pot

Aquilegia 'Nora Barlow' has moderate water needs and performs best with consistent moisture, especially during spring growth and flowering. Water regularly during dry spells in late spring and early summer, aiming to keep the soil evenly moist but not saturated. Clay and loam soils retain moisture well, so check before watering to avoid overwatering. In autumn and winter, natural rainfall is usually sufficient, and the plant is fully hardy to zone 3, requiring no winter protection in temperate European gardens. Feed in March and April as new growth emerges. Apply a balanced granular fertiliser such as blood, fish and bone or a general-purpose feed like Growmore around the base of the plant, following packet instructions. Alternatively, top-dress with a 3 cm layer of well-rotted compost or manure, which feeds the soil and improves moisture retention. Avoid high-nitrogen feeds, which promote lush foliage at the expense of flowers. Refresh mulch annually in spring, maintaining a 5 cm layer of organic matter around the plant to suppress weeds and conserve moisture. Keep mulch away from the crown to prevent rot. Powdery mildew is the most common problem, particularly in dry conditions or crowded plantings. It appears as white powdery patches on leaves, usually after flowering. Improve air circulation, water at the base rather than overhead, and remove affected foliage promptly. Aphids occasionally cluster on young shoots and flower buds; squash by hand or spray with soapy water. Leaf miners create pale winding trails in the foliage but rarely cause serious harm—simply remove affected leaves. Aquilegia sawfly caterpillars can strip foliage rapidly in late spring; inspect regularly and pick off by hand if seen.