• Close-up of delicate white Corncockle Bianca flowers by Bishy Barnabees Cottage Garden Ltd, featuring thin green stems in a lush garden with more white blooms, greenery, and a few orange flowers in the background.
  • A hand holds a glass bottle with a Corncockle Bianca bloom by Bishy Barnabees Cottage Garden Ltd, surrounded by colorful garden flowers and green leaves against a white wooden wall.
  • A close-up of a single white Corncockle Bianca flower by Bishy Barnabees Cottage Garden Ltd, featuring delicate petals with small brown speckles, set against a blurred green and purple floral background.
  • A yellow circular badge with a black and white bee in the center reads "RHS PLANTS FOR POLLINATORS"—ideal for supporting pollinators when choosing Corncockle Bianca seeds by Bishy Barnabees Cottage Garden Ltd.
  • The Corncockle Bianca by Bishy Barnabees Cottage Garden Ltd features a large white flower with delicate petals and visible stamens, blooming on a vine with green leaves and tendrils against a light gray wooden wall.
  • Close-up of Corncockle Bianca by Bishy Barnabees Cottage Garden Ltd—delicate white flowers with curved petals and long green stems bloom elegantly in a garden, ideal for moon gardens with blurred greenery in the background.
  • A woman in a denim dress stands among tall white Corncockle Bianca flowers from Bishy Barnabees Cottage Garden Ltd, holding blooms and gazing down amid cloudy skies and trees.
  • A close-up of a white Corncockle Bianca flower from Bishy Barnabees Cottage Garden Ltd, displaying delicate pale brown veins on its petals, set against a blurred background of green stems and more white blooms.
  • A bumblebee hovers near Corncockle Bianca’s delicate white blooms atop long stems in a lush field. The blurred background highlights these graceful flowers by Bishy Barnabees Cottage Garden Ltd, ideal for a moon garden.
  • Close-up of delicate white Corncockle Bianca flowers from Bishy Barnabees Cottage Garden Ltd, with slender green stems and leaves. The petals feature fine veins and yellowish centers, densely filling the field under a cloudy sky.
  • Close-up of delicate white blooms from Corncockle Bianca by Bishy Barnabees Cottage Garden Ltd, showing pale green stems and buds in a field, with more blurred flowers in the background beneath an overcast sky.
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Corncockle 'Bianca' Seeds

Silky, pure white trumpets that sway on slender, silver-grey stems. A luminous 'Moon Garden' treasure that brings a wild, timeless romance to cottage borders.

Once a common sight in British cornfields, the Corncockle has become a rare garden treasure. 'Bianca' is the stunning pure white form of this wildflower, producing large, open trumpets with silky petals that seem to glow against their slender, silver-grey stems.

This is a plant of grace and movement. It doesn't form a heavy clump; instead, it sways gently in the breeze, weaving its way through other plants. It is the perfect choice for a "Moon Garden" or a white border, where its luminous blooms catch the low evening light. It is incredibly easy to grow, beloved by bees, and adds a touch of wild, timeless romance to any space.


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🌿 Understanding the Plant

Agrostemma githago 'Bianca' is a robust Hardy Annual (H7). As a selected white form of the heritage wildflower, it is perfectly adapted to the UK climate, surviving temperatures as low as -20°C. It is a "cool-season" specialist, meaning it establishes its best root systems when the soil is cool in either spring or autumn.

The "Autumn Secret": While many gardeners sow wildflowers in spring, the secret to the most architectural plants is September sowing. Autumn-sown 'Bianca' plants develop deep, resilient root systems over winter and burst into bloom weeks earlier than spring-sown counterparts, resulting in bushier, taller, and more floriferous specimens.

The "Weaving" Habit: Unlike bedding plants that form dense mounds, Corncockle has a slender, wiry framework. It is biologically designed to "weave" through taller grasses or companion plants, which provide natural structural support. This creates a translucent, layered look that adds depth and movement to a cottage border.

🌱 Growing Guide

Corncockle is one of the easiest plants to raise from seed, but it does have one specific requirement: it hates being moved.

How to Sow:
Direct sow outdoors in September for early summer blooms, or in March to May for a continuous mid-to-late summer display. Because of its sensitive taproot, direct sowing into its final position is essential. Scatter the seeds onto finely raked soil and cover with approximately 1cm of soil. Germination is typically rapid, occurring within 7-14 days.

Where to Plant:
They demand full sun and thrive in poor, well-drained soil. Over-feeding or planting in heavily manured ground will lead to soft, excessive leafy growth and weak stems that are prone to flopping. Space plants 20cm apart to allow them to interweave and support one another naturally.

Ongoing Care:
As 'Bianca' can reach heights of 90cm, we recommend providing light twiggy support early in the season if growing in an exposed or windy location. Deadheading spent flowers will encourage a longer blooming period, though leaving a few seed heads at the end of the season will allow the plant to self-seed and return year after year.

📋 Plant Specifications
Botanical Name Agrostemma githago 'Bianca'
Common Name White Corncockle
Plant Type Hardy Annual
Hardiness H7 (Ultra Hardy)
Light Requirements Full Sun ☀️
Height 60cm - 90cm
Spread 30cm
Spacing Plant 20cm apart
Flowering Period June to August
Perfect For 🌙 Luminous "Moon Gardens"
🐝 High-Quality Nectar for Bees
🌾 Naturalistic Meadow Style
✂️ Elegant Cut Flowers
Seeds per Packet Approximately 100 seeds
🤝 Beautiful Garden Combinations

The luminous white trumpets of 'Bianca' work spectacularly with partners from our available range:

  • ☁️ Ammi majus: The White Cloud. This is the ultimate sophisticated white-on-white pairing. The delicate, lacy umbels of Ammi majus (Bishop's Flower) provide a frothy backdrop that allows the larger trumpet blooms of 'Bianca' to shine. Together, they create a dreamy, multi-layered "Moon Garden" effect that glows at dusk.
  • 💙 Cornflower 'Blue Ball': The Meadow Classic. Recreate a traditional British wildflower meadow by pairing the pure white Corncockle with the electric blue Cornflower. This high-contrast combination is timeless, providing a high-quality nectar source for a vast array of bumblebees and butterflies.
📅 Sowing & Flowering Calendar

Direct sow in autumn for the strongest plants, or in spring for a delicate harvest of white trumpet blooms from early to mid-summer.

Month J F M A M J J J A S O N D
Direct Sow ✓ ✓ ✓ ✓
Flowering ✓ ✓ ✓

⚠️ Toxicity Warning
All parts of the Corncockle plant, especially the seeds, are poisonous if ingested. We recommend wearing gloves when handling and taking care in gardens frequented by pets prone to chewing foliage.

🏆 Biodiversity Hero

Known for its stamina and ability to thrive in poor soils, Agrostemma githago 'Bianca' is an essential choice for those wanting to create a romantic, low-maintenance wildflower display that supports long-tongued British pollinators.

📖 Want more detailed growing advice?
View our Complete Growing Guide for Wildflowers →

£2.35
£2.35
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    Close-up of delicate white Corncockle Bianca flowers by Bishy Barnabees Cottage Garden Ltd, featuring thin green stems in a lush garden with more white blooms, greenery, and a few orange flowers in the background.
    A hand holds a glass bottle with a Corncockle Bianca bloom by Bishy Barnabees Cottage Garden Ltd, surrounded by colorful garden flowers and green leaves against a white wooden wall.
    A close-up of a single white Corncockle Bianca flower by Bishy Barnabees Cottage Garden Ltd, featuring delicate petals with small brown speckles, set against a blurred green and purple floral background.
    A yellow circular badge with a black and white bee in the center reads "RHS PLANTS FOR POLLINATORS"—ideal for supporting pollinators when choosing Corncockle Bianca seeds by Bishy Barnabees Cottage Garden Ltd.
    The Corncockle Bianca by Bishy Barnabees Cottage Garden Ltd features a large white flower with delicate petals and visible stamens, blooming on a vine with green leaves and tendrils against a light gray wooden wall.
    Close-up of Corncockle Bianca by Bishy Barnabees Cottage Garden Ltd—delicate white flowers with curved petals and long green stems bloom elegantly in a garden, ideal for moon gardens with blurred greenery in the background.
    A woman in a denim dress stands among tall white Corncockle Bianca flowers from Bishy Barnabees Cottage Garden Ltd, holding blooms and gazing down amid cloudy skies and trees.
    A close-up of a white Corncockle Bianca flower from Bishy Barnabees Cottage Garden Ltd, displaying delicate pale brown veins on its petals, set against a blurred background of green stems and more white blooms.
    A bumblebee hovers near Corncockle Bianca’s delicate white blooms atop long stems in a lush field. The blurred background highlights these graceful flowers by Bishy Barnabees Cottage Garden Ltd, ideal for a moon garden.
    Close-up of delicate white Corncockle Bianca flowers from Bishy Barnabees Cottage Garden Ltd, with slender green stems and leaves. The petals feature fine veins and yellowish centers, densely filling the field under a cloudy sky.
    Close-up of delicate white blooms from Corncockle Bianca by Bishy Barnabees Cottage Garden Ltd, showing pale green stems and buds in a field, with more blurred flowers in the background beneath an overcast sky.