How to plant
When to plant
Plant Centaurea in spring after frost, or in early autumn so plants can root before winter. It establishes quickly and reliably in most climates.
Where to plant
Choose a sunny spot for the best flowering. Centaurea will tolerate light shade but produces fewer blooms. It grows well in borders, cottage gardens, wildflower-style plantings and pollinator beds.
Preparing the soil
Loosen the soil to 20–25 cm and mix in compost if needed. Centaurea prefers well-drained soil and is tolerant of poorer, drier ground. Avoid heavy, waterlogged sites; improve clay with grit to enhance drainage.
Preparing the plants
If planting bare-root or young divisions, soak the roots in water for 15–20 minutes before planting. For potted plants, water well and gently loosen the root ball to encourage quick establishment.
Planting the plants
Plant at the same depth as previously grown and space clumps 30–40 cm apart. Firm the soil lightly and water thoroughly after planting.
After planting
Keep the soil slightly moist as plants settle in. Once established, Centaurea becomes drought-tolerant and needs minimal care.
During growth
Deadhead spent blooms to encourage more flowers and prevent self-seeding if not desired. Water during prolonged dry periods and cut plants back after flowering to encourage fresh growth.
After flowering
Prune the entire plant back to 10–15 cm to stimulate new foliage and potential reblooming. In late autumn, tidy up dead stems but avoid cutting everything too early — insects may overwinter in the foliage.
Extra tips
Centaurea is excellent for wildlife gardens. It is deer-resistant, drought-tolerant once established, and spreads gradually. Divide every 3–4 years to maintain plant health and control size.
