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Cornflower

Centaurea cyanus

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Cornflower is a classic cottage garden annual with striking blue, pink, red, or purple flowers on slender stems, widely used for cutting and dried arrangements. Historically found in grain fields, it is hardy, vigorous, and self-seeds readily, making it low-maintenance. The flowers attract pollinators and are edible, suitable for garnishing salads and beverages.

Cornflower

Common Problems

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

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Yellow Leaveschevron_right
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Wiltingchevron_right
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Underwateringchevron_right
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Brown Spotschevron_right

Care Guide

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Light
Full sun (6–8 hours daily); essential for compact plants and intense flower color
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Water
Moderate to low; water when soil surface dries; drought-tolerant once established; avoid overwatering
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Soil
Well-draining, light to moderate fertility; pH 6.0–7.5; tolerates poor, sandy, or chalky soils
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Fertiliser
Minimal; light balanced fertilizer in spring or at planting; excess nutrients promote foliage over blooms
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Temperature
Cool to warm; ideal 55–75°F (13–24°C); hardy down to 0°F (-18°C); direct sow after last frost
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Humidity
Low to moderate; 30–45% humidity; prefers drier conditions; excellent air circulation

Toxicity

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Non-toxic; flowers are edible and commonly used in herbal teas and culinary applications

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.

Cornflower Care Guide — Centaurea cyanus | GreenScout