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Blue Centaurea
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Centaurea coerula · Asteraceae

Blue Centaurea

⚠️ Not safe for petsPerennial life cycle with annual flowering.30 to 61 cm
Full sunModerate wateringEasyResistant to temperatures down to -5 degrees Celsius.

Description & origin

Centaurea coerula is a perennial herbaceous plant known for its vibrant blue flowers. It is a popular choice in gardens due to its resilience and ease of cultivation.

Size

Can reach heights of up to 60 cm with an upright habit.

Foliage

Green, lanceolate leaves that give the plant an ornamental appearance.

Flowering

Blooms during summer, producing button-shaped inflorescences.

Detailed care

Light

Prefers full sun but tolerates some shade during the hottest hours of the day.

Soil

Well-drained soil rich in organic matter, with a slightly acidic to neutral pH.

Watering

Moderate watering, allowing the soil to dry slightly between waterings.

Temperature

Resistant to mild temperatures but should be protected from severe frosts.

Fertilising

Light fertilization in spring using a balanced fertilizer.

Repotting

Transplant in spring when plants are actively growing.

Pruning

Light pruning after flowering to promote healthy growth.

Propagation

Can be propagated by seeds or division of clumps in spring.

Common problems

Pests

Can be affected by aphids and mites, which should be controlled with appropriate insecticides.

Fungal diseases

Susceptible to diseases like downy mildew, especially in conditions of excessive humidity.

Sudden death

If the soil does not drain properly, the roots may rot, leading to the plant's death.

Uses & curiosities

In the garden

  • Ideal for borders and flower beds
  • Attracts pollinators to the garden
  • Great for floral arrangements

Other uses

Can be used in decorative pots

Did you know…

The flowers of Centaurea coerula attract pollinators such as bees and butterflies. This plant is often used in floral arrangements.