300 seeds 020009 £1.95 In stock
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Dark crimson, double flowers, whose colour doesn't fade. It dries brilliantly too. A long standing favourite.

Genus Centaurea
Group/Species cyanus
Variety Black Ball
Type Hardy Annual
Common Name Cornflower
Border Position Cutting Garden
Soil Type Broad Tolerance
Scent Unscented
Site Full Sun
Moisture Well-drained
Height 1.2m (4ft)
Spacing 30cm (12in)
Sowing, Seeds, Planting Sow March-May or August-October either under cover or direct into the garden. Thin to 30cm (12in). Late sowings in pots can either be planted out in autumn or overwintered under cover for planting out in spring.
Care Tips Make sowings at two to three-week intervals to prolong the display. Sowing in curves, rather than straight lines, often creates a more natural-looking effect. Water well until established. Keep picking or deadhead to encourage more blooms. Will self-sow.
Flowering May - July, 10-12 weeks from spring sowing
Vase Life 5-7 days. Dries well. They last brilliantly out of water - and so can be made into many types of arrangements and craft ideas.
Harvesting Flower production: 2-3 months. This is a cut-and-come-again variety.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  • Sow Under Cover/Plant Indoors
  • Direct Sow/Plant Outdoors
  • Flowers/Harvest
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Centaurea cyanus 'Black Ball' reviews

* * * * * Average based on 3 reviews

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Reviewed 25th April 2020 by Caroline

Very easy to grow. Sowed seed indoors and pricked out 16 days later. Too soon to comment on the flowers

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Reviewed 31st July 2019 by Jill

Fab flowerers. Gorgeous planted with lime nicotiana. Two blue seeds germinated from this pack.

Lovely colour

* * * * -

Reviewed 10th August 2015 by Lisa

I grew two sowings of this, one in autumn and one in spring. The autumn sowings were far taller, but too tall even for the back of my border and despite staking still flopped. The spring sown ones I pinched out and were far better behaved and looked better For longer.. The foliage is silvery too which makes a great foil for the flowers and looks good in a mixed border. Even the ones in semi shade did well. Would sow again!