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Centaurea cyanus Classic Romantic - seeds

Centaurea jacea
Brown knapweed, Rayed knapweed

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This adorable annual weed, once so common in our countryside and cornfields, surpasses itself in this romantic mix which easily creates an unforgettable picture with semi-double or single flowers in a blend of white and pink shades, ranging from light pink to carmine red, and sometimes bicoloured blooms. These cornflowers are very decorative in large drifts and bloom for months on end, especially the faded flowers are removed. They like full sun and fertile, well-drained soil.
Flower size
3 cm
Height at maturity
60 cm
Exposure
Sun
Annual / Perennial
Perennial
Germination time (days)
21 days
Sowing method
Direct sowing
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Sowing period April to May, October to November
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Flowering time June to August
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Description

Centaurea cyanus Classic Romantic, also called cornflower or bachelor's button, is a mixture of pink and white, and sometimes bicoloured, single or semi-double flowers. Just like the adorable annual weed which once so widespread in our countryside and cornfields, they paint a simple but unforgettable picture. These cornflowers are very decorative in large drifts, perfect in wildflower compositions and bloom for months on end if flowers are removed as they fade. They like full sun and fertile, well-drained soil.

 

Cornflowers of the 'Classic Romantic' mix belong to the family Asteraceae. It is a selection of cultivars derived from Centaurea cyanus, an annual herbaceous plant native to Europe and North Asia that has long been considered an invasive weed in cereal crops and is one of the most beautiful wildflowers. It forms an upright clump of tender stems, reaching 65 cm high and 30 cm wide with very narrow, long, greyish-green leaves. The flowering period lasts from June to August with semi-double or single flower heads, 3 cm across. The ligulate flowers (or the petals surrounding the centre) are toothed at their tips and come in a blend of colours ranging from pure white to carmine red, including Indian pink and hot pink. Some flowers are bicoloured, displaying shades of white and pink. The centre of the inflorescence is made up of dark purple florets. The flowers are very nectar-rich.

  

Cornflowers are enchanting in flowerbeds where they form remarkable patches of colour. The 'Classic Romantic' mix, delightful descendants of the most famous of them all, brings the charm of the countryside to our gardens. Sow cornflowers in natural-looking beds, combined with ornamental grasses such as Stipa tenuifolia or Muhlenbeckia capillaris, catnips, pink love-in-a-mist, California poppies and purple cornflowers. The edible flowers can be used to decorate summer salads. It is also an excellent cut flower.

Flowering

Flower colour violet
Flowering time June to August
Inflorescence Flower head
Flower size 3 cm
Bee-friendly Attracts pollinators
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Deciduous
Foliage colour green

Plant habit

Height at maturity 60 cm
Spread at maturity 50 cm
Growth rate normal

Botanical data

Genus

Centaurea

Species

jacea

Family

Asteraceae

Other common names

Brown knapweed, Rayed knapweed

Botanical synonyms

Centaurea pratensis

Origin

Western Europe

Product reference21447

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Planting and care

Sow cornflower 'Classic Romantic' seeds outside, in their final positions, in March-April. Choose a sunny spot with well-drained soil that has been well-prepared and raked to a fine tilth. Sow thinly, to a depth of 3 mm, spacing the seeds 30 cm apart. Water regularly, especially during dry periods. Germination usually takes 14-21 days. When the cornflower seedlings are large enough to be handled, transplant them 15 cm apart. An alternative is to sow them indoors from August to September to obtain blooms at the beginning of summer, the following year. Sow the cornflowers on the surface of good quality soil at a temperature of 18-23 °C, and cover with a sprinkling of very fine garden compost or vermiculite. Keep the seedlings in the light as this helps germination. When the seedlings are large enough to be moved, transplant and grow them in a place sheltered from the cold until the seedlings are large enough to be moved outside. Grow the cornflower seedlings in a frost-free place before planting out the following spring, or pricking them out in pots. Cornflowers thrive in fertile, well-drained, fine soil, in full sun.

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Sowing period

Sowing period April to May, October to November
Sowing method Direct sowing
Germination time (days) 21 days

Intended location

Suitable for Meadow
Type of use Border, Edge of border, Slope
Hardiness Hardy down to -29°C (USDA zone 5) Show map
Ease of cultivation Amateur
Exposure Sun
Soil pH Neutral, Calcareous
Soil moisture Moist soil, ordinary, well-drained

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