Water moderately during the growing season, allowing the soil to dry out slightly between waterings. Reduce watering significantly in autumn and winter to prevent root rot.

Ensure good drainage to avoid waterlogging, as this plant is drought-tolerant once established.

Remove spent flower stalks after blooming to encourage a tidier appearance and prevent self-seeding. Minimal pruning is required.

If necessary, trim any dead or damaged foliage in late winter or early spring before new growth emerges.

Propagation is typically done by seed. Sow seeds in autumn or early spring, preferably in a cold frame or unheated greenhouse. Scarification or stratification may improve germination rates.

Division of established clumps is also possible but less common.

Repotting is generally not required as Pyrenean Thistle is a perennial that prefers to establish itself in its final location. If growing in a container, repot only when the plant becomes severely root-bound, typically every 2-3 years, using a well-draining soil mix.