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Cornflower Black Ball

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Another beauty from the Cornflower family. Black Ball is actually more of a very deep, dark plum colour than black and is absolutely stunning when used as a cut flower. I love it teamed up with the bright orange of calendula for a real eye-catching display, but it's also wonderful in softer arrangements and sits very well amongst pinks, blues, and reds too.

Bees and other pollinators adore cornflowers; grow them, and your garden will be buzzing and humming all summer long. Keep deadheading or cutting bunches of flowers for friends to prolong the flowering season.

Seed Quantity: 400 Seeds 

Type Annual

Genus Centaurea cyanus

Sow Seeds Sow in September for larger, stronger plants and/or in late April.  Can be sown in modules to transplant later or directly into the soil.  Pre-water the soil before sowing.  Sow thinly and cover only very lightly. Do not let the soil dry out.  Grow in poor, well-drained soil and in full sun, and it is advisable to grow through some netting as they are prone to flopping over in high winds without support.

Plant Out: July–October  Keep cutting and deadheading to encourage more blooms

Flowers June-September

Height & Spread 60-90cm high x 30cm spread

Cornflower Black Ball

RHS Plants for Pollinators

The RHS Plants for Pollinators mark is only given to plants that support pollinating insects.

Find out more at

    Cornflower Black Ball bouquet in a vase on a table
    Close-up of Cornflower Black Ball flowers in a garden, certified as plants for pollinators
    Arrangement of Cornflower Black Ball flowers with varied hues in a vase

    Customer Reviews

    Based on 1 review
    Tamsin Wilson

    Can't wait to see how these grow. Thank you! Colourful website with helpful product information

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    • Fast Dispatch

      We aim to dispatch all orders within 24hrs of receiving them

    • Packaging

      Seeds are delivered in eco friendly packaging and thick card envelopes.

    • Returns

      We offer a full refund on items returned in their original packaging