Centaurea montana ‘Alba’ forms a dense mat of grey-green leaves and bears clusters of white flowers that are sometimes tinged pink. Centaurea Alba flowers during late spring and early summer, adding a burst of elegance to any garden. A great choice for flower beds, borders, and groundcover, this charming perennial is a true delight for garden enthusiasts.. Learn how to grow Centaurea. Height: up to 45cm. Pollinator friendly. Prefers Full Sun or Partial Shade. Blooms late Spring to early Summer. Supplied as First Grade Bare Roots. Ships in spring