Water Sweet-Nancy regularly during the growing season, allowing the soil to dry out slightly between waterings. Reduce watering in autumn and winter.

Ensure good drainage to prevent root rot, as it dislikes waterlogged conditions. Overwatering can lead to fungal diseases.

Prune Sweet-Nancy after flowering to maintain a tidy shape and encourage bushier growth. Deadhead spent blooms regularly to prolong flowering.

In late winter or early spring, cut back plants to about 10-15 cm from the ground to stimulate new growth.

Propagate Sweet-Nancy from seeds sown in spring or by taking softwood cuttings in late spring or early summer. Seeds can be sown directly into the garden or started indoors.

Cuttings root readily in moist, well-drained soil or a seed-starting mix.

Repot Sweet-Nancy every 2-3 years, or when the plant becomes root-bound. Choose a pot with good drainage holes and use a well-draining potting mix, such as a mixture of loam, sand, and compost.

Repot in early spring before new growth begins.