Bellflower in April: monthly care

Campanula persicifolia thrives in full sun or partial shade, making it a versatile choice for borders and cottage-garden schemes. It performs best in well-drained loam or chalky soil with good structure. Before planting, dig over the site to a spade's depth and work in a generous amount of garden compost or well-rotted manure to improve drainage and fertility, especially if your soil is heavy clay. Plant container-grown bellflowers in March, April or May for establishment before summer, or in September and October for autumn planting. Dig a hole slightly wider than the root ball and set the plant at the same depth it was growing in its pot. Space plants 30 cm apart to allow for their mature spread of 25–40 cm and to ensure good air circulation, which helps prevent mildew. After planting, firm the soil gently around the roots and water thoroughly to settle the plant in. Apply a 5 cm layer of mulch such as garden compost or bark chips around the base, keeping it clear of the crown to avoid rot. This helps retain moisture and suppress weeds while the plant establishes. Water regularly during the first growing season, especially in dry spells, to encourage a strong root system. Campanula persicifolia is fully hardy to zone 3a, so no winter protection is needed in temperate European climates. The plants will develop a clump of narrow, evergreen basal leaves and send up tall flower spikes reaching 40–90 cm in early summer. Avoid planting in waterlogged sites, as bellflowers resent sitting in wet soil over winter.

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.