Onopordum X prefers consistently moist soil during its active growth phase, but it's crucial to avoid waterlogging. Allow the top few centimeters of soil to dry out between waterings.

Reduce watering significantly during cooler months or when the plant is dormant to prevent root rot. Ensure good drainage in containers.

Pruning of Onopordum X is generally minimal. Remove any dead, damaged, or diseased stems as needed.

If the plant becomes too large or straggly, you can cut back stems in late winter or early spring to encourage bushier growth. Wear gloves as the plant can be spiny.

Onopordum X can be propagated by seed, sown in early spring either directly outdoors or in a greenhouse. Seeds may benefit from a period of cold stratification.

Division of established clumps is also possible in spring, but care must be taken due to the plant's potentially spiny nature.

Repotting of Onopordum X is rarely necessary for established garden plants. For container-grown specimens, repot every 2-3 years in spring into a slightly larger pot if root-bound.

Use a well-draining compost mix and handle with care due to the spiny foliage.