Caring for Indian Bean Tree

Indian bean trees are low-maintenance once established. Water newly planted trees regularly during their first two growing seasons, especially in dry spells between April and September—aim for a thorough soak every 7–10 days rather than frequent light watering, which encourages shallow roots. Established trees tolerate moderate drought but perform best with consistent moisture; water during prolonged dry periods in summer to prevent leaf scorch on the large foliage. Feed in March and April with a general-purpose granular fertiliser (such as Growmore or blood, fish, and bone) scattered around the root zone and watered in. A single spring application is sufficient; avoid high-nitrogen feeds later in the season, which promote soft growth vulnerable to frost. Refresh the mulch layer each spring to suppress weeds, conserve moisture, and gradually improve soil structure as it breaks down. Catalpas are fully hardy across temperate Europe (zone 5a–9b) and require no winter protection. The large, heart-shaped leaves emerge late—often not until May—and drop early in autumn, sometimes after the first frost. This is normal; don't mistake late leafing for winter damage. Pests and diseases are rarely serious. Catalpas can suffer from powdery mildew in humid summers, causing a white coating on leaves; this is largely cosmetic and doesn't warrant treatment. Verticillium wilt occasionally affects catalpas, causing branch dieback; prune out affected wood promptly and sterilise tools between cuts. Aphids may cluster on young shoots in spring but seldom require intervention. The long, bean-like seed pods persist through winter and can be left on the tree or cleared up as preferred—they're harmless but numerous.