Cornflower ‘Blue Diadem’ Seeds (Centaurea cyanus)

Add classic cottage garden charm with Cornflower ‘Blue Diadem’ (Centaurea cyanus). This annual produces striking deep blue, fringed flowers that bring vibrant color to borders, meadows, and cutting gardens. Easy to grow and long-flowering, it attracts pollinators and creates a timeless, eye-catching display.

How to Grow

• Sow directly outdoors in spring or autumn.

• Use well-drained soil in full sun.

• Scatter seeds thinly and cover lightly with soil.

• Keep soil moist until germination (7–14 days).

• Thin seedlings to 20–25 cm apart once established.

• Deadhead regularly to prolong flowering and maintain plant vigor.

Key Features

• Striking deep blue, fringed flowers

• Hardy annual, easy to grow and long-flowering

• Ideal for borders, meadows, and cutting gardens

• Attracts bees, butterflies, and other pollinators

• Classic cottage garden appeal

Ideal For

• Flower borders and cottage gardens

• Meadow-style plantings and naturalized areas

• Cutting gardens for fresh bouquets

• Pollinator-friendly landscapes

Sowing

• Best time: Spring or autumn directly outdoors

• Germination: 7–14 days

• Sow thinly, cover lightly, and keep soil moist

• Prefers full sun and well-drained soil

Quick Tip

• Sow successive batches every 2–3 weeks in spring to extend the flowering season.