Corncockle

Agrostemma githago

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verifiedReviewed by the GreenScout Team

A charming, old-fashioned hardy annual with slender, silvery stems and large pink or magenta flowers with distinctive black veining, blooming from late spring through summer. Reaching 60–90 cm tall, it is perfect for wildflower meadows, cottage gardens, and cut flowers. Extremely easy to grow from seed and thrives in poor soil.

Common Problems

Select the problem your Corncockle is experiencing to get a treatment guide.

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Leggy Growthchevron_right

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Boltingchevron_right

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Underwateringchevron_right

Care Guide

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Light

Full sun (6+ hours daily)

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Water

Moderate; water regularly but allow soil to dry between waterings. Drought-tolerant once established.

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Soil

Well-draining, poor to average soil. Does not require rich soil; tolerates sandy or gravelly conditions.

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Fertiliser

Minimal fertilizer; avoid rich feeding which promotes foliage over flowers

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Temperature

Cool-season annual; prefers moderate temperatures but tolerates heat

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Humidity

Low to moderate humidity; good air circulation prevents disease

Toxicity

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Seeds and foliage contain saponins and other toxins that are toxic to cats, dogs, and children if ingested

Common Diseases

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Common Pests

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Seasonal Care

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Resume regular watering and feeding as growth picks up.

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Peak growing season. Water and feed regularly.

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Reduce watering as growth slows. Stop heavy feeding.

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Minimal watering and feeding. Protect from frost if needed.

Frequently Asked Questions

Is Corncockle safe to grow if I have pets or kids?

Use caution — the seeds and foliage contain saponins and other toxins that are toxic to cats, dogs, and children if ingested, so site it away from areas where pets or kids graze on plants.

Why does my Corncockle have black-veined petals?

That distinctive black veining on its large pink or magenta flowers is a natural feature of this old-fashioned wildflower, making it easy to identify in meadow and cottage garden plantings.