Blue Diadem Cornflower Seeds - Flower, 30 seeds

Quantity: 30 Seeds / pack

Blue Diadem cornflower (Centaurea cyanus) is a classic bachelor-button type with rich blue, fringed blooms on slender, branching stems. It is a cottage-garden staple and a fine cut flower with a long vase life.

Cornflowers are among the easiest annuals from seed: direct-sown in spring, they bloom for months.

Why choose our seeds?

• Rich blue, fringed bachelor-button blooms on branching stems
• Easy, fast annual — direct sow in spring for months of flowers
• Good cut flower and a favorite of bees

How to grow Blue Diadem Cornflower seeds

Choose Your Planting Method

• Indoors: Start indoors 4 to 6 weeks before the last frost if desired, but direct sowing is preferred.
• Outdoors: Direct sow in early spring as soon as the soil can be worked; make a second sowing a few weeks later for extended bloom.

Prepare Your Materials

• Seed-starting trays or pots (if indoors)
• Well-draining potting mix
• Spray bottle for misting

Sowing the Seeds

• Sow about 1/5 inch (5 mm) deep in moist soil.
• Cornflowers dislike root disturbance, so sow where they are to flower.

Provide the Right Conditions

• Light: Full sun.
• Temperature: 59–68°F (15–20°C).

Germination

• Germination in 7 to 14 days.
• Thin crowded seedlings so plants have room to branch.

Transplanting

• If started indoors, transplant carefully while small, after frost danger.
• Spacing: 8 to 12 inches apart.

Care Tips

• Sun: Full sun for the sturdiest stems and most flowers.
• Water: Average; water in dry spells but avoid waterlogging.
• Fertilizer: Seldom needed; too-rich soil causes floppy growth.
• Deadhead regularly to keep flowers coming; leave some heads to self-sow for next year.

Bloom Time:

Blooms from early summer into fall.