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Centaurea depressa - M.Bieb.

Common Name Iranian knapweed
Family Asteraceae or Compositae
USDA hardiness 6-9
Known Hazards None known
Habitats Fields and roadsides to 2300 metres in S. Europe[50].
Range W. Asia - Iran and the Caucasus. Naturalized in S.E. Europe[50].
Edibility Rating    (2 of 5)
Other Uses    (0 of 5)
Weed Potential No
Medicinal Rating    (0 of 5)
Care (info)
Fully Hardy Well drained soil Moist Soil Full sun
Centaurea depressa Iranian knapweed


Tracey Slotta @ USDA-NRCS PLANTS Database
Centaurea depressa Iranian knapweed

 

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Summary


Physical Characteristics

 icon of manicon of flower
Centaurea depressa is a ANNUAL/PERENNIAL growing to 0.3 m (1ft).
See above for USDA hardiness. It is hardy to UK zone 7. It is in flower from July to August. The species is hermaphrodite (has both male and female organs) and is pollinated by Bees, flies, Lepidoptera (Moths & Butterflies). The plant is self-fertile.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils, prefers well-drained soil and can grow in nutritionally poor soil. Suitable pH: mildly acid, neutral and basic (mildly 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.

UK Hardiness Map US Hardiness Map

Synonyms

C. pygmaea

Habitats

 Cultivated Beds;

Edible Uses

Edible Parts: Root
Edible Uses:

Root - cooked. An agreeable flavour[2, 105].

References   More on Edible Uses

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.


None known

References   More on Medicinal Uses

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FOOD FOREST PLANTS

Other Uses

None known

Special Uses

References   More on Other Uses

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]. A very ornamental plant[1]. Members of this genus are rarely if ever troubled by browsing deer[233].

References   Carbon Farming Information and Carbon Sequestration Information

Temperature Converter

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Propagation

Seed - sow April 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. The seed can also be sown as soon as it is ripe in the late summer in a greenhouse and planted out in the late spring. 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 plants. 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

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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 NameHabitHeightHardinessGrowthSoilShadeMoistureEdibleMedicinalOther
Centaurea acaulis Perennial0.0 -  LMHNDM001
Centaurea calcitrapaCommon Star Thistle, Red star-thistleBiennial0.6 0-0  LMHNDM11 
Centaurea chamaerhaponticum  0.0 -  LMHNDM20 
Centaurea cyanusCornflower, Garden cornflower, Blue Bottle, CornflowerAnnual1.0 0-0 FLMHNDM222
Centaurea ibericaIberian Star Thistle, Iberian knapweedBiennial0.9 5-9  LMHNDM120
Centaurea jaceaBrown KnapweedPerennial0.6 5-9  LMHNDM110
Centaurea melitensisMaltese Star ThistleAnnual0.5 6-9  LMHNDM010
Centaurea montanaMountain Cornflower, Perennial cornflower, Mountain BluetPerennial0.5 3-9 FLMHNDM023
Centaurea nigraBlack Knapweed, Lesser knapweedPerennial0.6 4-8  LMHNDM120
Centaurea raphanina Perennial0.0 -  LMHNDM10 
Centaurea scabiosaGreater KnapweedPerennial0.9 4-8  LMHNDM02 
Centaurea solstitialisSt. Barnaby's Thistle, Yellow star-thistleAnnual/Biennial0.6 5-9  LMHNDM110

Growth: S = slow M = medium F = fast. Soil: L = light (sandy) M = medium H = heavy (clay). pH: A = acid N = neutral B = basic (alkaline). Shade: F = full shade S = semi-shade N = no shade. Moisture: D = dry M = Moist We = wet Wa = water.

 

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Author

M.Bieb.

Botanical References

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Links / References

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Subject : Centaurea depressa  
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