Cornflower 'Polka Dot Mixed' Seeds

Centaurea cyanus 'Polka Dot' is a robust Hardy Annual (H7). As a dwarf-selection form of the British native wildflower, it is perfectly adapted to the UK climate, surviving temperatures as low as -20°C. While heritage cornflowers can reach over 1 metre, 'Polka Dot' is specifically bred for a compact, mounded habit, typically topping out at 50cm.

The "Autumn Secret": While many gardeners sow Cornflowers in spring, the secret to the most floriferous plants is September sowing. Autumn-sown 'Polka Dot' plants develop massive, resilient root systems over winter and burst into bloom weeks earlier than spring-sown counterparts, providing a low, dense carpet of multi-coloured flowers from early summer.

A Generous Self-Seeder: Cornflowers are one of the best species for naturalizing. If you allow the final flower heads of the season to remain on the plant, they will disperse seeds that readily germinate the following spring—often appearing in delightful, unexpected gaps between paving stones or at the edges of garden paths.

Cornflowers are among the easiest plants to raise from seed, providing a high kaleidoscope of colour for very little effort.

How to Sow:
Direct sow outdoors in September or October for the earliest blooms, or in March to May for a continuous summer display. Cornflowers possess a deep taproot and hate being moved; for this reason, direct sowing into their final position is always the most successful method. Scatter the seeds onto finely raked soil and cover lightly (approx. 1cm deep). Germination typically occurs within 10-14 days.

Where to Plant:
They demand full sun and thrive in almost any well-drained soil. Paradoxically, Cornflowers perform better in average, "hungry" soils. Over-feeding or planting in heavily manured ground will lead to soft leafy growth and weak stems. This compact variety is the ideal choice for window boxes, path edges, or front-of-border positions.

Ongoing Care:
As 'Polka Dot Mixed' is a dwarf variety, it rarely requires structural support. Regular harvesting for small posies or deadheading spent flower heads weekly is essential to stimulate the plant into producing fresh buds; if left to set seed too early, the plant will stop flowering. For a continuous display, sow a small batch every 3-4 weeks throughout the spring.

This colourful dwarf mix acts as its own rainbow, but it pairs spectacularly with these available partners from our range:

• ☁️ Ammi majus: The Texture Match. The tall, lacy white umbels of Ammi majus provide a soft, neutral backdrop that ties all the vibrant 'Polka Dot' colours together. This creates a professional, multi-layered "wild meadow" display where the lower cornflowers pop against the airy white lace.
• 🐰 Bunny Tails Grass: The Tactile Pair. The soft, fluffy white seed heads of Bunny Tails (Lagurus ovatus) add wonderful movement and a tactile element to the planting. Since both are compact and love poor soil, they are the perfect duo for a designer container display on a sunny patio.

Direct sow in autumn for the strongest plants, or in spring for successional waves of multi-coloured blooms through the summer.