An old fashion Cottage garden plant with blue double flower.
Soil & Site
average, not rich
blue, many small ray flowers gives the double effect, involucre of bracts at the base
lanceolate, linear, green
may need staking, can ressed in the right conditions
seeds, in sito
Introduced before 1600 in the United States.
Centaurea (enus name) is derived from the name of a plant in Greek mythology (kentaurion or centaureum) in which Chiron, one of the half-man half-horse centaurs (kentauros), is said to have used knapweed (species from this Centaurea genus) to heal a wound on his foot. (#145)
To me this is one of the bluest (true blue) flowers available. May revile the Delphinium blue.
Notes & Reference
#51-Armitage's Manual of Annuals, Biennials, and Half-Hardy Perennials (Alan Arimitage), #108-Restoring American Gardens (Denise Wiles Adams), #145-Plant Lives, (Sue Eland) www.plantlives.com