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Cornflower Trailing Blue Carpet Seeds - Centaurea cyanoides

Centaurea cyanoides Trailing Blue Carpet

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This little known annual cornflower with a prostrate habit, exhibits cobalt-blue flowers that bloom lengthily throughout the summer. This plant loves dry climates and soils, making it an excellent alternative to lobelias for adding that very decorative splash of blue colour to hanging baskets and window boxes! It also allows you to liven up a rock garden or sunny border, all in the space of a season. It likes full sun and well-drained soil.
Flower size
2 cm
Height at maturity
10 cm
Exposure
Sun
Annual / Perennial
Annual
Germination time (days)
18 days
Sowing method
Direct sowing, Sowing under cover
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Sowing period February to April
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Flowering time June to August
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Description

Centaurea cyanoides Trailing Blue Carpet

 

Centaurea cyanoides Trailing Blue Carpet belongs to the family Asteraceae. It is a cultivar derived from Centaurea cyanoides, an annual herbaceous plant native to Syria, Israel and that is also widespread in Cyprus. The plant grows spontaneously in degraded, arid zones such as garrigues and Mediterranean steppes. It forms in the space of one season, a dense, slightly mat-forming clump with tender stems, reaching 10 cm high and 45 cm wide, that bears very narrow, long, woolly, greyish-green leaves. It flowers from June to August, depending on the date of sowing, or earlier in milder climates. The inflorescences consist of flower heads, 2 cm across. The ligulate flowers (or the petals surrounding the centre) are toothed at their tips and are of very bright, medium-blue that is close to the hue of chicory flowers. The centre of the inflorescence is made up of purplish florets. The flowers are very melliferous and nectar-rich.

  

Cornflowers are enchanting in flowerbeds where they form remarkable patches of colour. The 'Trailing Blue Carpet' variety, a delightful descendant of the oriental cousin of the common cornflower, brings a fresh touch of new to our window boxes and rock gardens with its blue flowers. Sow it in wild-looking beds, in dry soils where it is beautiful combined with ornamental grasses such as Stipa tenuifolia or Muhlenbeckia capillaris, common poppies, with pink love-in-a-mist, California poppies, the surprising Callirhoe involucrata, or the prostrate mallow with its purplish-pink flowers. Little bright red carnations (Dianthus grationopolitanus) and basket of gold will go well with it in container displays.

Flowering

Flower colour blue
Flowering time June to August
Inflorescence Flower head
Flower size 2 cm
Bee-friendly Attracts pollinators
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Deciduous
Foliage colour green

Plant habit

Height at maturity 10 cm
Spread at maturity 45 cm
Growth rate fast

Botanical data

Genus

Centaurea

Species

cyanoides

Cultivar

Trailing Blue Carpet

Family

Asteraceae

Origin

Middle East

Product reference829871

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Planting and care

Sow cornflower 'Trailing Blue Carpet' 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. Dwarf Syrian cornflower thrive in well-drained soils, even dry ones, in full sun.

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Sowing period

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

Intended location

Suitable for Meadow, Rockery
Type of use Border, Edge of border, Slope
Ease of cultivation Amateur
Exposure Sun
Soil pH Any
Soil moisture Dry soil, Very well-drained, sandy or gravelly.

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