How to Prune mealy centaury 'Steenbergii'?
Deadhead regularly to prolong flowering

mealy centaury 'Steenbergii' · Centaurea dealbata 'Steenbergii'
Any well-drained soil in full sun; good drought resistance. A fairly dry, poor soil is best as plants can be invasive if soil is rich and moist.
Deadhead regularly to prolong flowering