Centaurea 'Jordy'

3 × 9cm pots £23.97 £19.99
in stock (shipped within 5-7 working days)
9cm pot £7.99
in stock (shipped within 5-7 working days)
Quantity 1 Plus Minus
Buy Centaurea 'Jordy' knapweed: Intense, near-black flowers

This perennial dies back to below ground level each year in autumn, then fresh new growth appears again in spring.

  • Position: full sun
  • Soil: well-drained soil
  • Rate of growth: average
  • Flowering period: May to July
  • Hardiness: fully hardy

    Magnificent, deepest plum-purple flowers top upright stems in late spring and early summer above bushy clumps of foliage. The flowers have a shaggy appearance and mix well with a whole host of colours including rusts, reds, purples and pinks. A new twist on a cottage garden classic, the seedheads will provide interest for several months after the flowers have faded.

  • Garden care: Stake with brushwood or bamboo canes before the flowers appear. Cut back to the ground after flowering and a second flush may appear. Lift and divide large clumps every three years in spring.

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Eventual height & spread

Eventual height and spread
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Beautiful colour


Got a few different cornflowers but this one is one of my favourite. Flowered from late May till September when dead headed.


South Wales


Great plants


Excellent service




A very long flowering period


Jordy started flowering in May and continued, with asiduos dead heading,until mid August. I was rewarded with a second flowering in October




I will buy more of these


Striking colour




Great colour


I planted this alongside Centaurea Jordy and Alba - what a fabulous looking bed until the drought struck but they all came back again and flowered into early November. Great plants on arrival, not huge but well rooted and got away when grown in the conservatory for a few weeks before hardening off and planting out. Very pleased with everything from Crocus.






This plant has a tendency towards mildew which is unattractive. Its lax habit may be fine in a crowded bed where it can be supported by other plants but in my beds it just looks droopy. Not very happy with it and think the space could be better occupied by something else.




Perfect for pop of colour in shady spot.


Bought to sit under a large willow at the edge of a patio area, and it is wonderful, doesn't mind the shade and has grown quickly and strongly. I am intending to buy another couple this year to add also sit under the willow tree shade. 




I would recommend this product


excellent plants well packaged and grew well when planted

maggie may



Needed more careful watching than I could give it


This beautiful, healthy Centaurea needed more attention than I could give it.I was away for an extended period in the summer & the three "Patty's Plum" poppies ( ordered at the same time ) survived & flowered !! This cornflower seems to have been devoured by slugs. There is no trace that it ever existed in my garden. Sorry Three poppies well established & flourishing


Pinner Middx

My new favourite


A perfect little filler for my new flower bed - great result beautiful hardy but delicate plants with such a vivid colour and architecturally beautiful flowers. Has done brilliantl in my very wet but full sun and windy Scottish garden. Would definitely buy again

Missie Nix

Trossachs Scotland



4.3 11


If the centaurea gets mildew.......how to I treat it please ?

Garden gnome

Hello, If the plant is well established this is a relatively harmless disease. However, care should be taken with younger plants. If you don't want to use chemicals, you can mulch well in spring and autumn with well rotted farmyard manure, as this will prevent the roots drying out too much, and if possible, make sure the plants are not overcrowded so air can circulate around them. You should also remove all dead leaves in autumn to prevent the spores from over wintering. Alternatively you can spray at the first signs of infection with a good fungicide such as Doff Systemic Fungus Control, Bayer Garden Fungus Fighter or Scotts Fungus Clear Ultra.


Will this plant tolerate very boggy soil?

Clay boots

Hello there No these plants prefer a well drained soil, but there are other plants that will tolerate boggy soils. I have attached a link below to perennial plants that like a boggy/damp shade which you can further refine to soil type, flowering time etc. http://www.crocus.co.uk/plants/_/perennials/plcid.2/vid.101/ Hope this helps

Hi, Will these do well in pots? Thanks for your time.


Hello, These plants will prefer being in the ground, but you could grow it in a large pot - although it may be more susceptible to mildew.


Hi crocus plant people.....put my mind at rest! I have the blue version all over my garden, love them. Bought this black one to mix things up a bit in one of my beds and had it in a pot this year to see what it flowered like...it grew and flowered then I went on holiday.....the pot now appears empty barring compost whilst my blue ones are still sat there showing newly grown leafy mounds? Is this normal for the black one or have I lost it?


Hello there This is is a deciduous perennial so it will die back in the autumn, so it might have died back earlier than the blue form, alternatively you might have lost it if the pot dried out when you were on holiday. I would wait now until next spring, and fingers-crossed it comes back. Hope this helps.

Hi, can you tell me why you need to lift and divide clumps every 3 years - what happens if I don't do that? They overcrowd and suffocate or...? By the way: do they spread? Thanks


Hello, These do form clumps, which get bigger every year and will eventually grow to around 60cm across. You do not need to lift and divide them every 3 years, but if you don't, then the centre of the clump tends to become congested and it will then produce fewer flowers.


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