Cornflower- Black Ball

Centaurea cyanus Open Pollinated

Sow Now? Sow Now
Sub-Tropical Climates
Not sure which climate? View Best Months to Sow
  • Annual 90cm
  • Very dark double flowers
  • An excellent cut or dried flower

Standard seed packet, 50 seeds

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'Cornflower- Black Ball' seeds

Centaurea cyanus

  • Annual 90cm
  • Very dark double flowers
  • An excellent cut or dried flower

Annual growing to 90cm. Plants have an upright habit with long grey/green leaves and produce tall dark maroon double flowers. Good for cottage gardens, wildflower gardens, beds and borders. Makes an excellent cut flower or dried flower; colour doesn't fade. Attracts bees and butterflies to the garden. Has a history of medicinal uses. Is sometimes used as a companion plant. Also known as Blue-Bottle. Basket Flower and Bachelors Button. Can be grown in containers. Drought tolerant.

Seeds per gram: 220
Product code: F1-08

Best Months to Sow
  J F M A M J J A S O N D
Quick Sowing Guide
Method Sow direct or raise seedlings
Sowing Depth 5mm
Season Autumn, early winter and spring
Germination 7-14 days @ 15-18 °C
Hardiness / Life Cycle Hardy Annual
Plant Spacing 30cm
Plant Height 90cm
Position Full sun, well drained moist soil
Days Until Maturity 70 days

*Notes: Susceptible to mildew. Deadhead to prolong flowering. Plants may need some support.

How To Grow



We deliver Australia wide.

All orders are dispatched from our warehouse in Knoxfield, Victoria, Australia.

We do not deliver overseas.

Shipping cost is calculated using all the items in your shopping cart and your delivery postcode. The table below outlines the delivery options and costs.

Order dispatch time is currently 1-3 business days plus delivery time.
Please note we are unable to guarantee specific delivery dates or delivery timeframes, all delivery times are estimates only.


Order contains: Delivery options: Delivery cost per order
Small seed packets ONLY - Economy Delivery $3.00 or FREE on orders over $25 $5
Parcel Delivery Capped rate of $8.99
Express Delivery $15.00

BULK seed, garden supplies, tools, or accessories -

Parcel Delivery

Capped rate of $8.99

Express Delivery

Starting from $15.00
(Calculated by weight)
Live Plants - Live plants Capped rate of $10.00

*All orders sent to Western Australia are subject to mandatory inspection and fees by Quarantine WA. These fees are included in all shipping costs above.

**We will replace all orders that are lost or damaged in transit however we will not replace or refund orders simply because they were delivered later than estimated. Full details here.


Ratings & Reviews

Great for covering a large area

TheSeedCollection Response
Thanks for the review!
These self seed and grow like crazy. Mine have even flowered through both summer and winter in Tasmania on our farm.
Kylie Baumback 5 July 2016