Provide consistent moisture, especially during dry spells and the flowering period. Water deeply at the base of the plant, allowing the top layer of soil to dry slightly between waterings. Avoid waterlogging, which can lead to root rot. Established plants are somewhat drought-tolerant but perform best with regular hydration.

Deadhead spent flowers regularly to encourage continuous blooming and prevent self-seeding, which can lead to unwanted spread. After the main flush of blooms, cut back the entire flower stalk to the base to promote a second, smaller flush of flowers. In late autumn, cut back all foliage to ground level.

Propagate Campanula persicifolia by seed, division, or basal cuttings. Seeds can be sown indoors in late winter or directly outdoors in spring. Divide mature clumps every 3-4 years in spring or early autumn to maintain vigor and create new plants. Basal cuttings can be taken in spring.

For container-grown plants, repot every 1-2 years in spring into a slightly larger pot with fresh, well-draining potting mix. This provides new nutrients and prevents the plant from becoming root-bound. When planting in the garden, ensure adequate spacing to avoid overcrowding.