Cornflower 'Blue Diadem' is a decorative variety prized for its striking, frilled blooms in a rich, vivid blue that brings bold colour to borders, beds, and cottage gardens. The textured flower heads are eye-catching and distinctive, making this variety a cut above standard cornflower selections. Grown from trusted Unwins seeds, this variety delivers dependable garden performance season after season. Sow outdoors from March to May or August to October for flexible planting options that suit most gardening schedules, and enjoy flowers from June through to September – a long flowering period that ensures extended garden colour throughout the warmer months. The blooms are equally well suited to fresh floral arrangements and vase displays, making them an excellent choice for those who enjoy cutting flowers straight from the garden. Carrying RHS Plants for Pollinators approval, 'Blue Diadem' actively helps attract bees and beneficial pollinating insects, supporting garden biodiversity with minimal effort. Whether you are establishing a wildlife-friendly garden, a pollinator planting scheme, or simply want reliable summer interest with minimal fuss, this variety performs consistently across a wide range of growing conditions.
- Frilled, vivid blue blooms with eye-catching textured heads
- Flowers June–September for a long season of colour
- RHS-approved – attracts bees and pollinating insects
- Ideal for cutting and fresh vase or floral arrangements
- Sow March–May or August–October for flexible growing
'Blue Diadem' suits both informal wildflower-style planting and more structured cottage garden borders, blending naturally into relaxed, naturalistic displays. The vibrant blue flowers hold their colour well, creating visual impact whether grown en masse or dotted through mixed plantings. Suitable for outdoor sowing, this variety requires no specialist equipment or growing conditions, making it accessible for gardeners of all experience levels. For those looking to create natural-looking displays that also support local wildlife, this cornflower variety strikes a practical balance between ornamental appeal and ecological value – a genuinely worthwhile addition to any seasonal garden plan.
