bachelor button (Centaurea cyanus), photographi

How to Grow Bachelor Button

Centaurea cyanus

Bachelor Button is an annual grown for its blooms, which open from spring through fall. Notably, it shrugs off deer, shrugs off dry spells, and grows just as well in a container as in the ground. Its flowers are a real draw for honeybees, native bees, and butterflies.

Bachelor Button — the short answer

Bachelor Button: full sun, pH 6–7.5, about 65 days to maturity.

Soil pH
6–7.5
Growable Ground Plant Database
Sun
Full Sun
Growable Ground Plant Database
Days to Maturity
65 days
USDA-NRCS; Johnny's
Frost-kill temperature
20°F
Growable Ground Plant Database

Plant data: Growable Ground Plant Database, compiled from FAO ECOCROP, USDA PLANTS and university Extension sources — each tile names its own row's source, because per-field provenance varies.

Score your parcel · free

Score Bachelor Button on your exact land.

Zone averages can't see the slope, soil, frost, and sun that decide whether bachelor button actually takes — and those shift from one yard to the next. Enter your address and we'll score bachelor button against your land's real conditions.

We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.

No card required · your full report in seconds

What Bachelor Button is

Bachelor Button grows as an annual and reaches around 2.5 feet at maturity. It blooms from spring through fall. It's also deer-resistant and well suited to containers.

How to grow Bachelor Button

Bachelor Button does best in full sun — at least 6 hours of direct sun a day — and soil from pH 6 to 7.5, on well-drained ground. It needs around 700 growing degree days to mature, which is why climate matters as much as soil.

USDA Zones

Data pending

Soil pH

6 - 7.5

Growable Ground Plant Database

Sun

Full Sun

Growable Ground plant catalog

Drainage

well (dry spells)

Growable Ground plant catalog

Frost Kill Temperature

20°F

Where cold starts killing growing tissue. Not a winter-survival floor — a dormant perennial takes far colder, which its hardiness zone answers.

Growable Ground Plant Database

Days to Maturity

65 days

Bachelor's button / cornflower; annual; cool-season; edible flowers.

USDA-NRCS; Johnny's

GDD Required

700+

Growing degree-days of accumulated warmth it needs to mature — humid summers reach this faster than cool coastal ones.

Growable Ground plant catalog

Mature Height

2.5 ft

Growable Ground plant catalog

Frost-Free Days

0+

The frost-free stretch it needs start to finish — short-season areas may need an indoor head start.

Growable Ground plant catalog

  1. Start the season right

    Plant bachelor button in full sun with at least 6 hours of direct sun. It grows in the cool halves of the year, so sow it in spring or late summer rather than waiting for midsummer heat.

  2. Match the soil

    Bachelor Button prefers pH 6 to 7.5 (Growable Ground Plant Database). A quick soil test from your local Extension lab tells you whether to add lime or sulfur to land in band.

  3. Water steadily

    Keep the root zone evenly moist through establishment. A 2–3 inch mulch layer holds moisture without waterlogging.

  4. Harvest at its peak

    Cut bachelor button blooms in the cool of the morning, just as they open, for the longest display.

Where Bachelor Button thrives

Whether bachelor button thrives on a given site comes down to its soil pH, drainage, sun, and frost dates — the conditions that vary parcel to parcel.

What grows around Bachelor Button

In rotation planning, bachelor button counts as a Other — beds recover best when other crops don’t follow each other in the same spot year over year. (Growable Ground derivation — crop-rotation group from botanical family)

Good to know

Good news for pet owners — bachelor button isn't known to be toxic to dogs or cats. (Source: ASPCA.)

Bachelor Button is a standout pollinator plant — high value to bees and other pollinators. (Source: Pollinator Partnership.)

Your land is one point inside Bachelor Button's range

This page resolves to the species. Your state page draws the county line, and a report reads the parcel — the soil pH, drainage, sun, and frost dates on your exact ground, which no species average can see.

Free Report

See if Bachelor Button will thrive on your land

Zone averages are a start. Your exact soil pH, drainage, sun exposure, and frost dates shape whether bachelor button actually takes — we score it against the real conditions at your address.

Three things about your exact spot that zone averages miss:

Your soil pHYour frost-free daysYour sun & shade

We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.

25+ data sources analyzed in seconds

How we know this about Bachelor Button

The figures above are cited per row, not per site: the pH band names this plant’s own source column, the three temperature figures each carry their own, and days-to-maturity cites the publication that actually lists it. All of it comes from the Growable Ground Plant Database — a compilation over FAO ECOCROP, USDA PLANTS, and university Extension sources, published openly with per-field provenance.

Grounded inUSDA PLANTS DatabaseUSDA PHZMASPCA

Frequently asked questions

Can I grow Bachelor Button in my zone?

Zone data for bachelor button is being finalized. A Growable Ground report checks your parcel's full suitability against federal soil, climate, and zone data.

When should you plant Bachelor Button?

Bachelor Button is a cool-season crop, so it goes in during the cool halves of the year — early spring, and again in late summer for a fall planting — rather than at the height of summer heat. Your local frost dates set the exact window — a Growable Ground report reads them for your address.

How much sun does Bachelor Button need?

Bachelor Button needs full sun — a spot that catches at least 6 hours of direct summer sun a day. In more shade it still grows, but usually gives a smaller, later crop. The catch is that a yard rarely gets even light everywhere — a fence, the house, or one tall tree can quietly take those hours. A Growable Ground report reads the real sun-hours across your land, canopy and buildings included, so you can pick the brightest bed before you plant.

What soil does Bachelor Button need?

Bachelor Button prefers soil pH 6 to 7.5, on well-drained ground (Growable Ground Plant Database). Your report scores your parcel's actual soil against that using USDA SSURGO data.

Does Bachelor Button attract pollinators?

Yes — bachelor button's flowers are a strong nectar and pollen source for honeybees, native bees, and butterflies. (Source: Pollinator Partnership.)

Is Bachelor Button safe for pets?

Bachelor Button is not known to be toxic to dogs or cats based on available data. Always supervise pets around new plantings. (Source: ASPCA.)