Cornflower.

En un coup d'œil

Niveau d'entretien

Facile

Type de plante

Annual

Lumière

Full sun

Lumière en intérieur

Soleil direct

Arrosage

Tous les 3 à 7 jours

Taille adulte

3 feet

Croissance

Rapide

Rusticité

USDA 2 à 11

Floraison

Late spring to mid summer

Entretien

Sow seeds directly in the garden where they will get plenty of sun. Keep the soil moist until they sprout and watch for aphids during the growing season. Deadheading spent blooms will encourage the plant to keep producing flowers.

Arrosage

Water regularly to keep the soil consistently moist but not waterlogged.

Engrais

Apply a balanced liquid fertilizer once a month during the active growing season.

Taille

Remove faded flowers frequently to promote continuous blooming.

Rempotage

As annuals, these plants complete their life cycle in one season and do not require repotting.

Sol

Well draining loamy soil

pH du sol

6.0 to 7.5

Température

-15 à 30°C

Humidité

40 à 70%

Résistance à la sécheresse

Moyenne

Durée de vie

Annual, typically 1 year

Résistance aux chevreuils et lapins

Moyenne

Sécurité

Humains

This plant is generally considered non-toxic to humans.

Enfants

The seeds are small and could pose a choking hazard if ingested by young children.

Allergènes de contact

Some individuals may experience mild skin irritation from handling the stems.

Allergènes aéroportés

Pollen can trigger seasonal allergies in sensitive individuals.

Comestibilité

While the petals are edible, ensure they are grown without pesticides before consuming.

Comment l'identifier

• Vibrant blue ray florets
• Lance shaped gray green leaves
• Slender branching stems
• Papery bracts around flower base

Hauteur

0,3 à 0,9m

Envergure

0,2 à 0,4m

Feuilles

gray-green, deciduous

Fleurs

blue, pink, white, purple, 3 à 5cm

Problèmes courants

• Rust — Fungal infection causing orange spots on the undersides of leaves.
• Aphids — Small insects that cluster on new growth and suck plant sap.

La cultiver

Multiplication

seed

Quand planter

spring, autumn

Hivernage

In mild climates, autumn sown seeds will overwinter as small rosettes. In colder areas, the plant will die back completely after the first hard frost.

En pot

They grow well in pots at least 20 centimeters deep with well draining soil.

Plant these in blocks to provide a strong visual impact and better support for visiting pollinators.

Bonnes associations

• Field Poppy — They share similar growing requirements and create a classic meadow look.
• Garden cosmos — They bloom at the same time and provide a lovely contrast in form.

Espèces similaires

• Centaurea montana — It is a perennial relative with similar flower shapes.

Science

Famille

Asteraceae

Genre

Centaurea

Ordre

Asterales

Classe

Magnoliopsida

Région d'origine

Europe

Préservation

It is not of conservation concern and is widely naturalized.

It is an opportunistic annual that thrives in disturbed soils and sunny meadows.

Intérêt pour la faune

nectar source

Pollinisateurs

abeilles, papillons

Utilisations

cut flowers, pollinator gardens, edible garnishes

Taxonomie vérifiée avec le GBIF.

Ce qu'on demande souvent

Do I need to deadhead them?

Yes, removing spent blooms encourages the plant to produce more flowers throughout the season.

Can I grow them in pots?

They thrive in containers as long as they have good drainage and plenty of sunlight.

D'où vient le nom

The name Centaurea comes from the Greek myth of the centaur Chiron, who used the plant to heal a wound. Cyanus refers to the deep blue color of the petals.

Bon à savoir

• The intense blue pigment is highly prized in the cosmetic industry.
• It was the favorite flower of John F. Kennedy.
• These flowers are a traditional symbol of the Estonian national identity.
• They are very easy to grow from seed directly in the garden.