plant image thumbnail
plant image thumbnail
plant image thumbnail
plant image thumbnail
Cornflower

English Name

Centaurea

Scientific Name

Description

Centaurea was once a common farmland weed, but breeding has turned it into a colorful annual for flowerbed or cutting. The tall group of Centaurea Cyanus reaches 2. 5 feet to 3 feet. The blue Diadem is a good choice with its large deep blue flowers. Dwarf group grows only about one foot and the best one to pick is the Polka dot. The blue varieties are grown for use in arrangements.

1' - 3'

Height (feet/inches)

9" - 1'

Spacing (feet/inches)

Hardy Annual

Life Cycle

Flower

Type

None

Fragrance

Colors

Watering

Water regularly in dry weather.

Propagation

Sow seeds in September or April where they are to flower.

Cultivation

Centaurea are best in cool districts and will do well in almost any climate, provided the soil is on the alkaline side.

Pruning

Dead head regularly.

Tips

Stake tall varieties.

Care

Centaurea thrives in sun or partial shade. Flowers in June-September. Keep watch for mildew and aphids to which Centaurea are particularly prone.

Soil

Any well drained garden soil.



Did you know?

Scientists were able to revive a flowering plant from the fossilized fruit found in the stomach of an Arctic ground squirrel who was trapped in ice around 32,000 years ago.