Cornflower Red Boy (Centaurea cyanus) – red and carmine-pink blooms with buds

Cornflower Red Boy

£2.30
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Cornflower Red Boy (Centaurea cyanus) – red and carmine-pink blooms with buds
RHS Plants for PollinatorsBeginner friendly

Cornflower Red Boy

Centaurea cyanus 'Red Boy' — ruby-red selected form of a naturally blue species

2 reviews

Rich, deep carmine-pink ruby cornflowers like crushed velvet — the warm-toned berry sister of the cornflower family, with edible petals and exceptional pollinator value.

£2.30

Free UK delivery on seed orders over £40

Dispatched from our Norfolk farm by Royal Mail, usually within one working day.

Your growing year

Sow, plant out and flowering months for this variety

Jan
Feb
Mar
Apr
May
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Jul
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Sow
Plant out
In flower
SowPlant outIn flower

At a glance

Height
60–80cm
Spread
30cm
Spacing
30cm
Position
Full sun
Colour
Red
Seeds per packet
200
Soil
Lean, well-drained — no manure or compost; poor soil produces strongest stems
Grow guide How to grow Cornflower Red Boy Read the full guide →

About this variety

The name oversells it, and the flower is better for it. This is not a fire-engine red but a deep carmine-ruby, a berry tone that reads ruby in strong sun and shifts towards crushed velvet in softer light.

That warmth is what it brings to a border that has gone all blues and greens. It sits with the apricot and blush end of the cutting patch far better than a true scarlet would, and it is one of the few cornflowers that works in a warm-toned bouquet rather than a cool one.

Everything else is standard for a tall double Ball cornflower: silver-green stems, feathery foliage, generous production for as long as you keep cutting. The petals are edible and hold their ruby colour unusually well when dried, so they are worth saving for cake work. Sow it in autumn if the ground is workable. September-sown plants come through the winter and make substantially bigger, more branched specimens the following year than anything started in spring.

RHS Plants for Pollinators

This plant has been assessed by the Royal Horticultural Society and recommended as especially beneficial to bees, butterflies and other pollinators. Growing plants like this directly supports UK pollinator populations — something close to our hearts at Salle Moor Hall Farm, where we see the difference a cottage garden full of the right plants can make.

Learn more at RHS.org.uk →
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T
Tamsin Wilson

Looking forward to seeing these beauties grow. Great service and easy to navigate website.

I
Ian Peters
Corian cottage garden

Haven’t used the seeds yet. But we’ll packaged and delivery was very quick.