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Cornflower Blue ball in the GardenTags plant encyclopedia

Centaurea cyanus 'Blue Ball'

 

Cornflower 'Blue ball'

Centaurea is a genus of herbaceous, thistle-like flowering plants that may be annuals, perennials or subshrubs. It is a tallish plant with raggedy-petalled flowers from late Spring into late Summer. . There are many common names for this genus. 'Cornflowers' is often used for a few species, but it is generally reserved for varieties of Centaurea cyanus, which is also sometimes also 'basket flower' Centaura cyanus has simple or slightly lobed leaves and solitary 3-4 cm flower-heads on multiple-stemmed branches in late Spring and Summer 'Blue Ball' is a double blue Cornflower with bright blue flowers and green/grey leaves.

Contributed by @janric

 
plant Features
  • Cornflower Blue ball likes full sun

    Full sun

  • Cornflower Blue ball likes very little water

    Very little water

  • Cornflower Blue ball is full frost hardy: 5f (-15°c)

    Full Frost Hardy: 5F (-15°C)

  • Cornflower Blue ball likes free draining and fertile

    Free draining and fertile

 
plant information

Common name

Cornflower 'Blue ball'

Latin name

Centaurea cyanus 'Blue Ball'

type

Flowering plant

family

Asteraceae

ph

5.0 - 8.5 Acid - Neutral

  • Light

    Cornflower Blue ball likes full sun

    Full sun

  • Frost

    Cornflower Blue ball is full frost hardy: 5f (-15°c)

    Full Frost Hardy: 5F (-15°C)

  • Soil

    Cornflower Blue ball likes free draining and fertile

    Free draining and fertile

  • Water

    Cornflower Blue ball likes very little water

    Very little water

Plant & bloom calendar

  •  
    Best time to plant
  •  
    When the plant will bloom

full grown dimensions

The size of a fully grown Cornflower Blue ball is 0.35meters x 0.50meters 0.35 M 0.50 M

Centaurea cyanus 'Blue Ball'

Centaurea is a genus of herbaceous, thistle-like flowering plants that may be annuals, perennials or subshrubs. It is a tallish plant with raggedy-petalled flowers from late Spring into late Summer. . There are many common names for this genus. 'Cornflowers' is often used for a few species, but it is generally reserved for varieties of Centaurea cyanus, which is also sometimes also 'basket flower' Centaura cyanus has simple or slightly lobed leaves and solitary 3-4 cm flower-heads on multiple-stemmed branches in late Spring and Summer 'Blue Ball' is a double blue Cornflower with bright blue flowers and green/grey leaves.


Planting Outdoors

From Early Spring TO Late Spring

Plant container grown plants into site having dug compost into the soil first.

 

Propagation by seed Spring

From Early Spring TO Mid Spring

Sow cornflower seeds outdoors where they are to grow from early spring. Choose a position in full sun on well drained soil which has been raked to a fine tilth. Sow seeds thinly, at a depth of 3mm (1/8") in drills spaced 30cm (12") apart. Water the ground regularly, especially during dry periods. Germination usually takes 14-21days. When cornflower seedlings are large enough to handle, thin them out to 15cm (6") apart. Alternatively, grow cornflowers indoors in early spring for early summer flowering next year. Sow cornflowers on the surface of a good quality seed compost at a temperature of 18-23C (65-73F) and cover with a very fine sprinkling of compost or vermiculite. Do not exclude light as this helps germination. When seedlings are large enough to handle, transplant and grow them on in cooler conditions until large enough to move outdoors.

 

Flowering

From Late Spring TO Late Summer

The flowers appear from late Spring to late Summer

 
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