Centaurea nigra

Genus: Centaurea

Species: nigra

Family Name: Compositae/Asteraceae

Seed Catalogue No.: 306H

English Name(s): Hardheads

Hardiness: Hardy

Lifecycle: Perennial

Colour: Red/Maroon

Flowers: June, July, August, September

Lighting Conditions: Full Sun, Partial Sun

Soil Type: Clay, Chalk, Sand, Loam

Soil Acidity: Alkaline, Neutral, Acid

Moisture: Well-drained

Germination Instructions

Sow indoors. Sow 2mm deep into moist well-drained seed compost. Propagate at 15-20°C. Normally germinates in the dark. 7-14 days for germination. Transplant seedlings once large enough to handle to 8cm pots. Can sow direct into prepared, raked soil 3mm deep in drills 30cm apart. Thin to 15cm spacing when large enough to handle.

Growing Instructions

Does not like to be too crowded.

Cultivation Instructions

No pruning  required. This wild flower requires little attention. self-seeds readily and can become invasive.

When to Sow

• Sow Under Cover/Plant Indoors
• Direct Sow/Plant Outdoors
• Flowers/Harvest

Approximate number of seeds per packet: 50

Please note we pack the majority of our seeds by volume so the number of seeds indicated is only an approximation.