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?

Most plant cells look like little boxes full of green disks. The disks are called chloroplasts. Other organelles inside a plant cell include a nucleus (where the DNA is kept), a large central vacuole (where water and other materials are stored) and a complex internal skeleton or cytoskeleton made of various proteins.