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White Perennial Cornflower in the GardenTags plant encyclopedia

Centaurea montana 'Alba'

 

White Perennial Cornflower

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'. Centaurea montana is a rhizomatous perennial. It has simple or lobed leaves, hairy on the underside, and, in late Spring to Summer, blue 5 cm. flower-heads reddish in the centre

Contributed by @dandelion1

 
plant Features
  • White Perennial Cornflower likes full sun

    Full sun

  • White Perennial Cornflower likes very little water

    Very little water

  • White Perennial Cornflower is full frost hardy: 5f (-15°c)

    Full Frost Hardy: 5F (-15°C)

  • White Perennial Cornflower likes free draining and fertile

    Free draining and fertile

 
plant information

Common name

White Perennial Cornflower

Latin name

Centaurea montana 'Alba'

type

Flowering plant

family

Asteraceae

ph

5.0 - 8.5 Acid - Neutral

  • Light

    White Perennial Cornflower likes full sun

    Full sun

  • Frost

    White Perennial Cornflower is full frost hardy: 5f (-15°c)

    Full Frost Hardy: 5F (-15°C)

  • Soil

    White Perennial Cornflower likes free draining and fertile

    Free draining and fertile

  • Water

    White Perennial Cornflower 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 White Perennial Cornflower is 0.75meters x 1.00meters 0.75 M 1.00 M

Centaurea montana 'Alba'

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'. Centaurea montana is a rhizomatous perennial. It has simple or lobed leaves, hairy on the underside, and, in late Spring to Summer, blue 5 cm. flower-heads reddish in the centre


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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