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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 rhs.org.uk/plantsforpollinators

    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

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    Tamsin Wilson

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

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    Guarantees

    • 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