300 seeds 020008 £1.95 In stock
Items will be despatched in 5-7 working days.
5 seedlings, for spring planting 510733-5 £5.95 Delivery late March
When in stock, please allow up to 1 week for delivery.
10 seedlings, for spring planting 510733-10 £9.95 Delivery late March
When in stock, please allow up to 1 week for delivery.

Or buy this as part of our Amethyst and Sapphire Cut Flower Mix and Hardy Annual Cutting Patch Collection.

More Details

Centaurea cyanus 'Blue Boy' is a large-flowered cornflower in classic bright blue. This wonderful coloured bloom will continue for 2-3 months in the summer.

This is one of the prettiest wild flowers, and it used to populate entire fields with its incredible hue. It's juice even used to be extracted and mixed with alum to make a watercolour.

No cottage garden is complete without its cornflowers – Loved by Pollinators and brilliant as cut flowers. We use lots of them for wedding and party flowers to make table runners and napkin rings, as they last brilliantly out of water.

Genus Centaurea
Group/Species cyanus
Variety Blue Boy
Type Hardy Annual
Common Name Cornflower
Border Position Middle
Soil Type Chalky, Neutral, Sandy
Scent Unscented
Site Full Sun, Shelter
Moisture Moist but Well-drained, Well-drained
Height 90cm (36in), or if autumn-sown 1-1.2m (39-47in)
Spacing 30-40cm (12-16in), 45cm (18in) if autumn sown
Sowing, Seeds, Planting Sow in mid spring and/or late summer for larger, earlier flowers the following year.
Care Tips Deadhead to encourage further flowering. Needs staking.
Flowering June - August, 10-12 weeks from spring sowing
Vase Life 5-7 days. Dries well.
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

We don't currently have additional advice on using / growing this particular product on our website, but if you do have a question that isn't answered on this page then please give us a call on 0345 092 0283 and we'll happily chat through any queries you may have, or email us on plantadvice@sarahraven.com (for advice on all things growing) or info@sarahraven.com for anything else.


Plant Delivery - When in stock, please allow up to 1 week for delivery.

Seeds Delivery - Items will be despatched in 5-7 working days.

Click here to find out more information about our delivery rates and times.

Centaurea cyanus 'Blue Boy' reviews

* * * * * Average based on 12 reviews

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Reviewed 26th September 2018 by Alice

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Reviewed 19th September 2018 by Frances

Healthy plants, good value for money.

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Reviewed 13th September 2018 by Lynda

Still flowering prolifically and very pretty

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Reviewed 6th September 2018 by Helene

The plants grew very well (but there were problems with the delivery: not according to the instructions given when placing the order).

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Reviewed 3rd September 2018 by Sandy

Absolutely fab! Definitely grow again and more of them.

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Reviewed 3rd September 2018 by Sally

Always friendly efficient service & quality plants .

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Reviewed 29th August 2018 by Brenda

As previously stated all was excellent.

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Reviewed 29th August 2018 by Rita

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Reviewed 29th August 2018 by Julie

The seedlings were quite small when they arrived but I potted them on as instructed and later planted them out on our Church Allotment twhere they thrived and have provided us with blooms throughout the summer. Pre delivery service quick and efficient.


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Reviewed 11th June 2016 by Dido

I had a go at growing these from seed and planting them in the autumn to overwinter, and it worked brilliantly - I was picking the first cornflowers in mid-May, just as the tulips went over, and they are not only beautiful but also prolific. A huge success.

Everlasting Sarah Raven-Corn flowers

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Reviewed 31st October 2015 by Mich Denney

It's the first year I have grown these beautiful little blue cherubs which just keep sprouting and sprouting and are still even sprouting new flowers nearly into November- they have been a central focal point in the walled garden at East Pennard and on open days It has been a great conversation topic and hopefully Sarah may have some more custom from it- I have used quite a lot tossed into salad bags which I grow and they look sublime- great bee attractor and very productive anual and with the amount of seed saved I will never need to buy a packet again

Gorgeous colour

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Reviewed 7th November 2014 by mia clark

These were the most brilliant blue, really showy, and grew easily from seed. I note that they are even bigger from autumn sowing so I will have a go. Excellent in a vase, they fade gently. I really love these!