 |
|
http://commons.wikimedia.org/wiki/File:Centaurea_nigra_Sturm24.jpg |
 |
| http://commons.wikimedia.org/wiki/User:Xemenendura |
Translate this page:
Summary
Physical Characteristics
Centaurea nigra is a PERENNIAL growing to 0.6 m (2ft).
See above for USDA hardiness. It is hardy to UK zone 5 and is not frost tender. It is in flower from June to September, and the seeds ripen from August to October. 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
Plant Habitats
Meadow; Cultivated Beds;
Edible Uses
Edible Parts: Flowers
Edible Uses:
Flower petals - raw. Added to salads[183].
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.
Diaphoretic Diuretic Tonic
The roots and seeds are diaphoretic, diuretic, tonic and vulnerary[4, 61]. The plant once had a very high reputation as a healer of wounds[4].
References More on Medicinal Uses
Other 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]. Established plants are tolerant of considerable neglect, thriving and even self-sowing in dense weed growth[K]. Members of this genus are rarely if ever troubled by browsing deer[233].
References Carbon Farming Information and Carbon Sequestration Information
Temperature Converter
Type a value in the Celsius field to convert the value to Fahrenheit:
Fahrenheit:
Plant 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. 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
Hardhead, lesser knapweed, common knapweed, black knapweed.
Native Range
EUROPE: United Kingdom, Ireland, Norway, Belgium, Germany, Netherlands, Croatia, Italy, Spain, France, Portugal AFRICA: Morocco Great Britain
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.
This plant can be weedy or invasive. Native to Europe; as an introduced species in other areas it can be a noxious weed. Washington, US - Class B noxious weed, Noxious weed seed and plant quarantine.
Conservation Status
IUCN Red List of Threatened Plants Status : This taxon has not yet been assessed.
IUCN Red List
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.
Support Plants For A Future
Plants For A Future relies on regular donations to keep our free database and search facilities going, to pay for ongoing research, improvements and enhancements, and to develop and publish new books.
Read more
Choose Currency
Donate in £ GBP
Donate in $ USD
Donate in € EUR
Securely pay via PayPal or Credit/Debit Card without an account.
Expert comment
Author
L.
Botanical References
17200
Links / References
For a list of references used on this page please go here
Readers comment
| Add a comment |
|
If you have important information about this plant that may help other users please add a comment or link below. Only comments or links that are felt to be directly relevant to a plant will be included. If you think a comment/link or information contained on this page is inaccurate or misleading we would welcome your feedback at [email protected]. If you have questions about a plant please use the Forum on this website as we do not have the resources to answer questions ourselves.
* Please note: the comments by website users are not necessarily those held by PFAF and may give misleading or inaccurate information.
|
Subject : Centaurea nigra
|
|
|
|