Black knapweed.

Auf einen Blick

Pflegestufe

Einfach

Pflanzenart

Perennial herb

Licht

Full sun

Licht im Innenraum

Direkte Sonne

Gießen

Alle 7 bis 14 Tage

Endgröße

30 to 90 cm

Wachstum

Mittel

Winterhärte

USDA 3 bis 8

Blütezeit

Early summer to early autumn

Pflege

Plant this in a sunny spot with well draining soil to keep it happy. Watch for aphids during the growing season and trim back spent blooms to encourage more flowers. Ensure the soil does not stay soggy for too long.

Gießen

Water deeply during dry spells but allow the soil to dry out slightly between sessions.

Düngen

A light application of compost in the spring is usually plenty for this plant.

Schneiden

Deadhead spent blooms throughout the summer to promote continuous flowering.

Umtopfen

If growing in a container, move to a larger pot every few years when roots become crowded.

Boden

Loamy or chalky

Boden-pH

Neutral to alkaline

Temperatur

-25 bis 30°C

Luftfeuchtigkeit

40 bis 70%

Trockenheitstoleranz

Hoch

Lebensdauer

Short-lived perennial, typically 3 to 5 years.

Wildverbiss-Resistenz

Mittel

Sicherheit

Menschen

It is generally considered non-toxic but is not meant for human consumption.

Kinder

Keep away from small children as the flower heads can be prickly and the plant is not food.

Kontaktallergene

Handling the stems or leaves may cause mild skin irritation in sensitive individuals due to fine hairs.

Allergene in der Luft

Pollen can be a minor irritant for those with severe seasonal allergies.

Essbarkeit

This plant is not considered edible and may cause digestive upset if consumed.

So erkennst du die Pflanze

• Purple thistle like flower heads
• Dark fringed bracts below flowers
• Rough lance shaped green leaves
• Sturdy branching stems

Höhe

0,3 bis 0,9m

Breite

0,3 bis 0,6m

Blätter

green, gray-green, deciduous

Blüten

purple, pink, 2 bis 4cm

Häufige Probleme

• Powdery mildew — A white fungal growth on leaves often caused by poor air circulation or high humidity.
• Aphids — Small insects that cluster on new growth and suck plant sap.

Standort und Pflege

Vermehrung

seed, division

Pflanzzeit

spring, autumn

Überwinterung

Cut back dead foliage in late winter to make room for fresh spring growth. No special protection is needed as it is quite hardy.

Im Kübel

It grows well in large pots but requires excellent drainage to prevent root rot.

Pair this plant with native grasses to mimic a natural meadow ecosystem.

Gute Pflanzpartner

• Ox-eye Daisy — They share similar soil and light requirements in meadow plantings.
• Centaurea jacea — They create a beautiful textural contrast when planted in groups.

Ähnliche Arten

• Centaurea scabiosa — It is a larger, more robust relative with similar flower structure.

Botanisches

Familie

Asteraceae

Gattung

Centaurea

Ordnung

Asterales

Klasse

Magnoliopsida

Ursprüngliche Heimat

Europe and parts of Western Asia.

Artenschutz

It is a common and widespread species not currently under threat.

It thrives in grasslands and meadows by outcompeting grasses for space and providing essential nectar for pollinators.

Nutzen für Wildtiere

nectar source, supports diverse insect populations

Bestäuber

Bienen, Schmetterlinge, Nachtfalter

Verwendung

meadow gardens, pollinator borders, wildflower patches

Taxonomie abgeglichen mit GBIF.

Häufige Fragen

Does it need deadheading?

Deadheading can encourage a second flush of blooms but leaving them provides seeds for birds.

Is it invasive?

It can self-seed freely in ideal conditions but is generally well-behaved in a garden setting.

Woher der Name kommt

The genus name Centaurea refers to the centaur Chiron from Greek mythology who was said to have used the plant for healing, while nigra refers to the dark color of the flower bracts.

Gut zu wissen

• It is a classic plant of old hay meadows in the British Isles.
• The flower heads were historically used in herbal medicine to treat various ailments.
• It is highly resilient and can thrive in poor, rocky soils.

Auch in

• Trockenheitsverträgliche Pflanzen