Harebell prefers consistently moist but well-drained soil, especially during dry periods and active growth. Once established, it shows good drought tolerance. Avoid waterlogging, which can lead to root rot. Watering deeply less frequently is better than shallow, frequent watering to encourage strong root development.

Deadhead spent flowers regularly to encourage continuous blooming and prevent excessive self-seeding, which can make the plant spread aggressively. In late autumn, cut back the faded foliage to the ground to tidy the plant and prepare it for winter dormancy. This also helps to maintain plant vigor and appearance for the following season.

Harebell can be propagated by seed, division, or basal cuttings. Seeds can be sown directly outdoors in autumn or spring, requiring light for germination. Division of established clumps in spring or autumn is effective, ensuring each section has roots and shoots. Basal cuttings can be taken in spring from new growth, rooting easily in moist soil.

Repotting is generally not necessary for Harebell grown in the ground. For container-grown plants, repot every 2-3 years in spring into a slightly larger pot with fresh, well-draining potting mix. This refreshes the soil, provides more space for root growth, and helps prevent the plant from becoming root-bound, ensuring continued health and vigor.