Caring for Bellflower

Campanula persicifolia is a low-maintenance perennial once established, but a few seasonal tasks will keep it flowering reliably year after year. Water moderately during the growing season, particularly in prolonged dry spells in late spring and summer when the flower spikes are developing. The plant tolerates some drought thanks to its taproot, but flowering is best with consistent moisture. Reduce watering in autumn and winter, as the plant is dormant and excess moisture can lead to crown rot, especially on heavy soils. Feed in March and April to support strong growth and abundant blooms. Apply a balanced granular fertiliser such as Growmore or blood, fish and bone around the base of the clump, following the manufacturer's instructions. A light top-dressing of garden compost in early spring also provides a slow-release nutrient boost. Avoid high-nitrogen feeds, which promote leafy growth at the expense of flowers. Refresh the mulch layer each spring to suppress weeds and conserve moisture, keeping it clear of the crown. Campanula persicifolia is fully hardy and needs no winter protection in zones 7–9. The evergreen basal rosette will remain visible through the coldest months. Pests are rarely a problem, but watch for slugs and snails in spring, which can damage emerging shoots. Powdery mildew may appear on foliage in dry summers, particularly in crowded plantings; improve air circulation and avoid overhead watering. Rust can occasionally affect leaves; remove and bin infected foliage promptly to prevent spread.