All bear thistle-likewhich are excellent for , producing their main flush of blooms in summer with a second flush in autumn. Under good growing conditions the Perennial Cornflower spreads rapidly and should be lifted and divided every three years. Stake tall-growing types and dead-head to prolong the flowering . Cut the down to ground level in late autumn.
VARIETIES: C. dealbata has 2 fine varieties which grow about 2 ft tall and bloom in June and July. Space the plants 1.5 ft apart. ‘Steenbergii’ bears large crimsonwith white centres and the yellow-centred pink flowers of ‘John Coutts’ are even larger. Less popular but equally attractive is the taller C. macrocephala (3-4 ft) which produces yellow globular blooms on thick . C. montana (1.25 ft.
Flowering period: May-July) produces large numbers of feathery flowers in white, pink or purple.
SITE AND SOIL: Any well-drained garden soil will do – thrives in sun or light shade.
PROPAGATION: Divide clumps in autumn or spring.