Cornflower Plant Care

Cornflower (Centaurea cyanus) belongs to the Asteraceae family within the Centaurea genus. Cornflower is native to Europe. Cornflower is also known as Bachelor's Buttons, Bluebottle, Common Cornflower.

Cornflower displays an upright, branching perennial growth habit, reaching up to 3 inches tall with a spread of approximately 2 inches. Cornflower produces showy, thistle-like flower heads in various colors.

Leaf size: approximately 6 inches.

Centaurea cyanus requires watering every 7–14 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.

Cornflower thrives in full sun to partial shade light conditions. The optimal light range is 2000–8000 lux. Avoid placing Cornflower in direct, harsh sunlight for extended periods, as this can scorch the foliage.

Centaurea cyanus grows best at temperatures between 50°F and 80°F. Cornflower prefers humidity levels of 40–70%.

Well-draining sandy loam with added organic matter for moisture retention. Good drainage is essential for Cornflower to prevent waterlogging, which leads to root rot and fungal issues.

Repot every 2-3 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.

Cornflower can be propagated through seeds, division of clumps.

Cornflower is susceptible to aphids, spider mites, powdery mildew. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.

Cornflower grows outdoors in USDA Zone 2 – 11. Native to Europe, Cornflower is adapted to warm climates. In cooler regions, grow Cornflower as a houseplant or bring it indoors before the first frost.