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Plants directory Bachelor's Button

How to Grow and Care for Bachelor's Button

Bachelor’s Button (Centaurea cyanus), or cornflower, has a bit of name that may bring to mind the flower of a free spirit or a romantic soul. Native to Europe but beloved across the globe for its bold, colorful blooms and ability to thrive in a variety of

By Mariam Scott

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Published on June 16, 2025

Bachelor's Button
Bachelor's Button

In this article

Key Takeaways

  • Bachelor’s Button (Centaurea cyanus) is a hardy, colorful flowering plant, historically associated with bachelorhood and widely appreciated in both ornamental gardens and floral arrangements.
  • This sun-loving annual or short-lived perennial blooms from late spring to summer in vivid hues of blue, pink, purple, and white, thriving in USDA zones 3–9.
  • It prefers full sun, well-drained neutral to slightly alkaline soil, and moderate watering. Avoid soggy soil to prevent root rot and promote healthy growth.

“Bachelor’s Button”— a title that intrigues, and makes you think: Is there really a blossom for the unattached? Or is there something more magical within this delightful flowering?

Bachelor’s Button (Centaurea cyanus), or cornflower, has a bit of name that may bring to mind the flower of a free spirit or a romantic soul. But what is it about this lovely, blue (and sometimes pink, purple or white) bloom that has enchanted gardeners, as well as florists, for centuries? Its name may seem whimsical, carefree, and the flower is certainly living up to that name.

Common Names Bachelor's Button, Cornflower
Botanical Name Centaurea cyanus
Type Annual, biennial, or short-lived perennial
Height 1–3 ft tall, 1–2 ft wide
Sunlight Needs Full sun (6+ hours daily)
Soil Needs Well-draining, neutral to slightly alkaline (pH 6.0–7.5)
Watering Requirements Moderate; drought-tolerant once established
Bloom Time Late spring through summer
Flower Colors Blue (most common), pink, purple, white
USDA Hardiness Zones 3-9
Toxicity Non-toxic; flowers are edible and used ornamentally

Plant Name Story

Apparently, the name Bachelor’s Button refers to the bachelorhood. The flower was worn on mens' lapels to indicate that they were single. Also, the flower’s solitary bloom was believed to mirror the unattached bachelor’s way of life. Coincidentally, the name also references the button shape of the flower’s petals.

Bachelor's Button: native to Europe but beloved across the globe for its bold, colorful blooms and ability to thrive in a variety of settings. Whether growing in a meadow, cottage garden or container on your patio, it’s a plant as rugged as it is beautiful. Indeed, this flower has quite a history, hailed in some ancient traditions as representative of bachelorhood because of its bold, solitary blooms. Now it’s just as likely to be found decorating bouquets, wildflower gardens and even eaten as an edible flower.

Plant Care

Bachelor’s Button — A classic, easy-to-grow-to-plant with a splash of color. This plant needs little care and is versatile, so it is great for veteran gardeners as well as those just out of the gate.

Light

Bachelor’s Button cannot survive without sunlight. This flower will only thrive in full sun, producing its maximum flower potential. It should be planted where it gets at least six hours of direct sun each day. The sun not only enhances its vivid colors, but strengthens it as well, allowing the plant to grow tall and strong. Settle them in a sunny spot, and Bachelor Button will treat you to a dazzling display. When growing indoors, provide it with as much sun as possible from a south-facing window.

Soil

Bachelors Button is tolerant of soil. It is not fussy and will grow in most well-drained soils. Succulents can thrive in a range of pH levels, but they prefer a slightly alkaline soil with pH level between 6.0 and 7.5. The soil should also not be waterlogged — this plant does not like sitting in wet soil. When planting, use loose, well-draining dirt to prevent root rot. When you add organic matter to the soil, you make it able to hold onto nutrients, while also allowing for good drainage.

Water

Although Bachelor’s Button is relatively drought-tolerant once set up, it needs adequate watering regularly, especially during dry spells. Maintain the soil moisture at a medium level, allowing it to dry a little and not become soggy. Make sure the top layer dries out well before watering again. Watering too much will cause root rot, so it’s a matter of finding that balance. Water when the soil feels dry to the touch; don’t let the plant sit in water. Good drainage is essential for healthy

Pruning

While Bachelor’s Button is a low-care flower, occasional deadheading will help keep it looking fresh and stimulate additional blossoms during the growing season. Deadheading — removing spent flowers — will also inhibit the plant from going to seed too soon and encourage it to go on producing fresh buds.

  • Cut back after first flowers have come and gone to promote a second flowering round. 
  • Cut  dead or damaged stems in the growing season to create better airflow issues and curb disease. 
  • Snip off the spent blooms and flowers just above the next leaf node. 
  • Snip back any long or spindly stems to maintain a compact, bushy plant. 
  • Regular pruning keeps the plant looking neat and appealing. 
  • Deadheading promotes new blooms and gives the plant an attractive appearance.

Propagating

Bachelor’s Button propagates easily from seed, and you can grow it as a perennial if you’re in a warmer climate.

When propagation by seed:

  • Sow seed indoors six to eight weeks prior to the last frost. 
  • Sow 1/8 inch deep in seed-starting mix. 
  • Keep soil moist and maintain a temperature of around 70-degree Fahrenheit. 
  • Transplant seedlings outdoors after the last frost, spacing them 12 to 18 inches apart.

For propagation from cuttings:

  • Take stem cuttings of 4 to 6 inches long in early spring, right before the new growth starts. 
  • If starting with cuttings, remove lower leaves and dip cut end in rooting hormone. 
  • Pack the cuttings into a well-draining potting medium, keeping the soil wet. 
  • In three to four weeks, roots should develop.

Growing in Pots

This long-stemmed flower is an excellent choice for container gardening.

  • Choose a container that is at least 12 inches deep and has drainage holes. 
  • Bachelor’s Button doesn’t mind being a wee bit crowded in the pot, but it needs the room for its roots to spread. 
  • Choose a pot with good drainage from a quality potting mix. 
  • Put your pot in a sunny spot — since Bachelor’s Button loves the sun.

Overwintering

Bachelor's Button is a tough plant that can winter in most areas.

The general consensus is to treat Bachelor's Button as an annual in colder climates (zones 3-5), though, and save the seed for the next season. Otherwise cover the base of the plant with mulch to protect the roots, or bring potted plants indoors in the coldest months.

In warmer zones (6-9) the plant can even come back annual, particularly if well mulched. If you’re planting it in a container, place it in a protected area for the winter season.

Blooming

Bachelor’s Button is a dependable bloomer that provides you with flowers all growing long. Its fine but not timid flowers open from late spring to early summer and continue for weeks, drawing pollinators like bees and butterflies.

Full sun and well-drained soil encourage blooming. Regularly deadhead to encourage more flowers. Don’t over-fertilize, since excess nitrogen can inhibit blooming.

Common Issues

Bachelor’s Button is a relatively hardy and pest-resistant plant, but like any flower, it can fall prey to some common problems.

  • Ants, aphids and spider mites → Apply insecticidal soap to treat infestations, or spray with a dilution of water and mild dish soap. 
  • Snails and slugs: Use slug pellets or surround the base with crushed eggshells.
  • Powdery mildew In humid or crowded conditions, powdery mildew can attack the plant. Provide sufficient air circulation and refrain from watering overhead to prevent it from becoming moist. 
  • Root rot →If the soil doesn’t drain properly, root rot may occur, so make sure the drainage is adequate.
  • If the plant appears to be leggy or does not produce flowers → It might be a symptom of low light or excessive watering. Be sure to give it lots of direct sun and don’t have soggy soil.

Summary

Bachelor’s Button, with its whimsical name and cheerful blooms, is more than just a beautiful face in the garden—it’s a symbol of resilience, simplicity, and timeless charm. Whether you grow it in the ground or in pots, it is one of the low-maintenance plants that can withstand various climates, and its eye-catching flowers appeal to both gardeners and pollinators.

Just a touch of sun exposure, well-drained soil and attention, and you’ll be able to enjoy these colorful blooms for weeks, that evoke nostalgia and natural beauty. It is a plant for beginners and experienced green thumbs who love flowers that do well with little attention and really give maximum visual payoff.

FAQ

Can you grow Bachelor's Button indoor?

Though it’s not a great indoor plant, Bachelor’s Button can be grown in a bright window or under grow lights.

Are there different colors of Bachelor's Button flowers?

Yes! The common color is blue, but Bachelor’s Button can bloom pink, purple, and white, too.

How long do Bachelor’s Button flowers last?

They bloom primarily from late spring to summer and may continue to bloom for weeks. Deadheading will extend the length of blooming.