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Centaurea scabiosa - L.

Common Name Greater Knapweed
Family Asteraceae or Compositae
USDA hardiness 4-8
Known Hazards None known
Habitats Pastures, field edges and roadsides, usually on chalk[4, 17].
Range Much of Europe, including Britain, north to 68° N., east to the Caucasus and W. Asia.
Edibility Rating  
Other Uses  
Weed Potential No
Medicinal Rating  
Care
Fully Hardy Well drained soil Moist Soil Full sun
Centaurea scabiosa Greater Knapweed


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Centaurea scabiosa Greater Knapweed
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Summary


Physical Characteristics

 icon of manicon of flower
Centaurea scabiosa is a PERENNIAL growing to 0.9 m (3ft).
It is hardy to zone (UK) 4. It is in flower from Jul to September, and the seeds ripen from Aug to October. The species is hermaphrodite (has both male and female organs) and are pollinated by Bees, flies, lepidoptera, self.The plant is self-fertile.
It is noted for attracting wildlife.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils, prefers well-drained soil and can grow in nutritionally poor soil. Suitable pH: acid, neutral and basic (alkaline) soils and can grow in very alkaline soils.
It cannot grow in the shade. It prefers dry or moist soil and can tolerate drought.

Synonyms

Habitats

 Meadow; Cultivated Beds;

Edible Uses

None known

Medicinal Uses



Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.

Diaphoretic;  Diuretic;  Tonic;  Vulnerary.

The roots and seeds are diaphoretic, diuretic, tonic and vulnerary[4]. The plant once had a very high reputation as an ingredient of the Medieval 'salve', an ointment applied to heal wounds and treat skin infections[4, 254].

Other Uses

None known

Cultivation details

Succeeds in ordinary garden soil[1, 200]. Prefers a well-drained fertile soil and a sunny position[200]. Tolerates dry, low fertility and alkaline soils[200]. Does well in the summer meadow[24]. An important nectar plant for bees and butterflies[24]. Members of this genus are rarely if ever troubled by browsing deer[233].

Propagation

Seed - sow early spring in a cold frame. When they are large enough to handle, prick the seedlings out into individual pots and plant them out into their permanent positions in the summer. Division in autumn. Very easy, larger clumps can be replanted direct into their permanent positions, though it is best to pot up smaller clumps and grow them on in a cold frame until they are rooting well. Plant them out in the summer or following spring. This should be done at least once every three years in order to maintain the vigour of the plant. Basal cuttings in spring. Harvest the shoots when they are about 10 - 15cm long with plenty of underground stem. Pot them up into individual pots and keep them in light shade in a cold frame or greenhouse until they are rooting well. Plant them out in the summer.

Other Names

If available other names are mentioned here

Found In

Countries where the plant has been found are listed here if the information is available

Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it’s worth checking.

Conservation Status

IUCN Red List of Threatened Plants Status :

Related Plants
Latin NameCommon NameEdibility RatingMedicinal Rating
Centaurea acaulis 00
Centaurea calcitrapaCommon Star Thistle, Red star-thistle11
Centaurea chamaerhaponticum 20
Centaurea cyanusCornflower, Garden cornflower, Blue Bottle, Cornflower22
Centaurea depressaIranian knapweed20
Centaurea ibericaIberian Star Thistle, Iberian knapweed12
Centaurea jaceaBrown Knapweed11
Centaurea melitensisMaltese Star Thistle01
Centaurea montanaMountain Cornflower, Perennial cornflower, Mountain Bluet02
Centaurea nigraBlack Knapweed, Lesser knapweed12
Centaurea raphanina 10
Centaurea solstitialisSt. Barnaby's Thistle, Yellow star-thistle11

 

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Expert comment

Author

L.

Botanical References

17200

Links / References

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Subject : Centaurea scabiosa  
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