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Centaurea dealbata Stenbeergii

Centaurea dealbata Stenbeergii
Mealy centaury, Persian cornflower, Whitewash cornflower

5,0/5
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This young plant was just waiting to be planted. In a few days, it settled in nicely.

Laurence Allain , 10/09/2022

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This plant carries a 12 months recovery warranty

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Value-for-money
This centaury is a cousin of the cornflower. It is a taller version, bearing bright magenta pink flowers with a lighter centre illuminated in white. It is a hardy perennial that has kept the charm of wild plants. It grows quickly, craves sunlight, and is extremely generous. This plant is full of freshness. Indispensable in natural, slightly wild flower beds.
Flower size
5 cm
Height at maturity
60 cm
Spread at maturity
50 cm
Exposure
Sun, Partial shade
Hardiness
Hardy down to -29°C
Soil moisture
Dry soil, Moist soil
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Best planting time March to May, September to October
Recommended planting time February to May, September to November
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Flowering time July to September
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Description

Centaurea dealbata 'Steenbergii', also known as Persian Cornflower, is a taller version of the cornflower, with bright magenta pink petals highlighted with white. It is a hardy and highly adaptable perennial that has retained the charm of wild plants. Growing quickly and flowering from the first year, it thrives in sunny locations, making it a vibrant and generous plant. It is irreplaceable in natural flower beds and slightly wild areas of the garden.

 

The 'Steenbergii' Centaurea belongs to the Asteraceae family and is native to the Caucasus and northern Iran. This perennial has a semi-sucker forming root system and an upright tufted habit, reaching a height of 60cm (24in) and a width of 50cm (20in). It has a relatively fast growth rate. The flowering period, which attracts pollinating insects, occurs in June and July, with fluffy 5cm (2in) diameter heads in a vivid pink with a white centre. The flowers emerge from beautifully sculpted, scale-like buds. The deciduous foliage is composed of narrow, deeply incised, ovate leaves that are grey-green on the upper surface and more grey and pubescent on the undersides. It is a long-lived perennial.

 

It is well-suited for perennial borders, adding vibrant splashes of colour that complement nepetas, globe thistles, and clarkias. It also thrives in flower meadows, with a more striking display in poorer soils. In this setting, it can be mixed with other centaureas, grasses, sainfoins, ornamental garlic, borage, agrimony, corn marigolds, California poppies, cosmos, and damask nigellas. It also performs well in rockeries. Additionally, it makes an excellent cut flower, suitable for both dried and fresh bouquets.

 

The name Centaurea comes from the centaur Chiron, who was healed from a gaping wound caused by an arrow dipped in Hydra's blood. The wound was healed with the flowers of this plant, which now bears his name as the genus name. The specific epithet 'dealbata' is derived from the Latin verb 'dealbare', meaning "to become white", referring to the silver underside of its leaves.

 

Centaurea dealbata Stenbeergii in pictures

Centaurea dealbata Stenbeergii (Flowering) Flowering
Centaurea dealbata Stenbeergii (Foliage) Foliage

Flowering

Flower colour pink
Flowering time July to September
Inflorescence Flower head
Flower size 5 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
Suckering/invasive plant

Botanical data

Genus

Centaurea

Species

dealbata

Cultivar

Stenbeergii

Family

Asteraceae

Other common names

Mealy centaury, Persian cornflower, Whitewash cornflower

Origin

Central Europe

Product reference801922

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Planting and care

Centaurea dealbata 'Steenbergii' prefers regular, light, even poor, well-drained soil, as well as full sun. This plant thrives in moderately moist to moderately dry soil. It is very adaptable and tolerates short periods of drought and city pollution fairly well. Removing faded inflorescences will encourage the renewal of flowers. Robust and hardy, this plant will grow in most types of soil, in all regions. The plants can be pruned severely in summer to maintain a compact habit.

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Planting period

Best planting time March to May, September to October
Recommended planting time February to May, September to November

Intended location

Suitable for Meadow, Rockery, Woodland edge
Type of use Border, Slope
Hardiness Hardy down to -29°C (USDA zone 5) Show map
Ease of cultivation Amateur
Planting density 5 per m2
Exposure Sun, Partial shade
Soil pH Neutral, Calcareous
Soil type Chalky (poor, alkaline and well-drained), Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Dry soil, Moist soil, well-drained

Care

Pruning instructions Removing faded inflorescences will encourage the renewal of flowers. The plants can be pruned severely in the middle of summer to maintain a compact habit.
Pruning Pruning recommended once a year
Pruning time July to August
Disease resistance Very good
Overwinter Can be left in the ground
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