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Centaurea cyanus Pinkie - Cornflower seeds

Centaurea cyanus Pinkie
Cornflower, Bachelor's button, Bluebottle, Boutonniere flower, Hurtsickle, Cyani flower

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This Centaurea is an easy and floriferous annual with very fresh double flowers in shades of pink. They look superb when used in large clumps, and the plants will flower for months if the flowers are cut or if the faded flowers are regularly removed. The cornflower centaury is usually sown directly in the ground in spring or late summer. It thrives in full sun, in fertile soil that is moist and well-drained.
Flower size
3 cm
Height at maturity
70 cm
Exposure
Sun
Annual / Perennial
Annual
Germination time (days)
18 days
Sowing method
Direct sowing, Sowing under cover with heat
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Sowing period February to April, August to September
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Flowering time June to August
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Description

Centaurea cyanus 'Pinkie' is a variety of cornflower that stands out with its very double pink flowers, absolutely charming in the garden and for cutting. It is an annual plant, just like its ancestor the Cornflower or Field cornflower. Its charming flowers resemble pink pompoms and they bloom throughout the summer if you take care to regularly prune the faded ones. It is an ideal plant to liven up borders and floral arrangements, in a rustic or romantic composition.

The annual cornflowers of the 'Pinkie' variety belong to the Asteraceae family. Their ancestor, Centaurea cyanus, is a herbaceous annual plant native to Europe and northern Asia, long considered a weed in cereal crops. It is also one of the most beautiful wild flowers. Each plant forms an upright clump of weak, 70 cm (28in) tall stems, bearing very narrow and long, greyish-green leaves. It blooms from June to September, earlier or later depending on the sowing date. The flower heads are double, 2-3 cm (1in) in diameter. The ligules (or petals of the crown) are toothed at their tips. The centre of the inflorescence is composed of shorter florets. Clearly pink when they open, the heads fade slightly over time. The fruit is an achene that contains seeds that easily self-sow in light soil. Plants obtained from self-sowing may not be identical to the parent.

Annual cornflowers create remarkable spots of colour in borders and flower beds. Centaurea cyanus 'Pinkie' brings the charm of the countryside and the romantic charm of its pink flowering to our gardens. It will be beautiful sown in slightly wild borders, alongside medium-sized grasses such as Stipa tenuifolia or Mulhenbergia capillaris. Also grow it with poppies, Love-in-a-mist, large daisies, thistles (Eryngium, Echinops), or chamomiles. The edible flowers can be used to decorate summer salads. It is also an excellent cut flower.

Flowering

Flower colour pink
Flowering time June to August
Inflorescence Flower head
Flower size 3 cm
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Annual
Foliage colour green

Plant habit

Height at maturity 70 cm
Spread at maturity 25 cm
Growth rate very fast

Botanical data

Genus

Centaurea

Species

cyanus

Cultivar

Pinkie

Family

Asteraceae

Other common names

Cornflower, Bachelor's button, Bluebottle, Boutonniere flower, Hurtsickle, Cyani flower

Origin

Cultivar or hybrid

Planting and care

Sow the seeds of Pinkie outside, directly in place, in March-April or September. Choose a sunny location with well-drained, properly prepared and loosened soil. Sow the seeds thinly, to a depth of 3 mm (0in), with a spacing of 30 cm (12in). Water regularly, especially during dry periods. Germination usually takes 14 to 21 days. When the cornflower plants are large enough to handle, transplant them to 15 cm (6in) apart.

Another option is to sow indoors from August to September for earlier flowering the following year. Sow the cornflowers on the surface of good quality compost at a temperature of 18-23°C (64.4-73.4°F), and cover with a pinch of very fine compost or vermiculite. Keep the sowing in the light, as it aids germination. When the seedlings are large enough to handle, proceed with transplantation and grow them in a frost-free environment until the young plants are large enough to be moved outdoors. You can keep these cornflower plants in a frost-free location, prior to planting them in the ground the following spring, or in pots.

Annual centaureas thrive in fertile, well-drained, well-loosened soil that does not dry out too much and in full sunlight.

Sowing period

Sowing period February to April, August to September
Sowing method Direct sowing, Sowing under cover with heat
Germination time (days) 18 days

Intended location

Suitable for Meadow
Type of use Border
Ease of cultivation Beginner
Exposure Sun
Soil pH Any
Soil moisture Moist soil, fertile, well-drained

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