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Summary
Physical Characteristics
Urtica_cannabina is a PERENNIAL growing to 1.5 m (5ft) at a medium rate.
It is not frost tender. It is in flower from July to August, and the seeds ripen from August to October. The species is monoecious (individual flowers are either male or female, but both sexes can be found on the same plant) and is pollinated by Wind. The plant is not self-fertile.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist soil.
UK Hardiness Map
US Hardiness Map
Synonyms
Plant Habitats
Edible Uses
Young leaves - cooked[105, 177]. A very nutritious food, high in vitamins and minerals, it makes an excellent spinach substitute and can also be added to soups and stews. Only use the young leaves and wear stout gloves when harvesting them to prevent getting stung. Although the fresh leaves have stinging hairs, thoroughly drying or cooking them destroys these hairs. Nettle beer is brewed from the young shoots[200].
References More on Edible Uses
Medicinal Uses
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None known
References More on Medicinal Uses
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Other Uses
A strong flax-like fibre is obtained from the stems[200]. Used for making string and cloth[4, 46, 61, 123], it also makes a good quality paper[115]. It is harvested as the plant begins to die down in early autumn and is retted before the fibres are extracted[4, 99]. The following uses have been listed for U. dioica, but they are almost certainly also applicable to this species. The plant matter left over after the fibres have been extracted are a good source of biomass and have been used in the manufacture of sugar, starch, protein and ethyl alcohol[4]. An oil obtained from the seeds is used as an illuminant[4]. An essential ingredient of 'QR' herbal compost activator[32]. This is a dried and powdered mixture of several herbs that can be added to a compost heap in order to speed up bacterial activity and thus shorten the time needed to make the compost[K]. The leaves are also an excellent addition to the compost heap[12, 18, 20] and they can be soaked for 7 - 21 days in water to make a very nutritious liquid feed for plants[54]. This liquid feed is both insect repellent and a good foliar feed[14, 18, 53]. The growing plant increases the essential oil content of other nearby plants, thus making them more resistant to insect pests[18, 20, 54]. Although many different species of insects feed on nettles, flies are repelled by the plant so a bunch of freshly cut stems has been used as a repellent in food cupboards[4]. The juice of the plant, or a decoction formed by boiling the herb in a strong solution of salt, will curdle milks and thus acts as a rennet substitute[4]. This same juice, if rubbed into small seams of leaky wooden tubs, will coagulate and make the tub watertight again[4]. A hair wash is made from the infused leaves and this is used as a tonic and antidandruff treatment[172, 201]. A beautiful and permanent green dye is obtained from a decoction of the leaves and stems[4, 115]. A yellow dye is obtained from the root when boiled with alum[4, 115].
Special Uses
References More on Other Uses
Cultivation details
We have very little information on this species and do not know if it will be hardy in Britain, though judging by its native range it should succeed outdoors in most parts of the country. The following notes are based on the general needs of the genus. Prefers a nitrogen-rich soil[200]. The best fibre is produced when plants are grown on deep fertile soils[200]. Usually dioecious, but some plants are monoecious. Male and female plants must be grown if seed is required.
References Carbon Farming Information and Carbon Sequestration Information
Temperature Converter
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Plant Propagation
Seed - sow spring in a cold frame, only just covering the seed. Prick out the seedlings into individual pots when they are large enough to handle, and plant them out in the summer. Division succeeds at almost any time in the growing season. Very easy, plant them straight out into their permanent positions.
Other Names
If available other names are mentioned here
Native Range
TEMPERATE ASIA: Russian Federation-Western Siberia (Western Siberia), Russian Federation-Eastern Siberia (Eastern Siberia), Kazakhstan (southeast), Kyrgyzstan, Mongolia, Russian Federation-Far East (Far East), China (Heilongjiang Sheng, Hebei Sheng, Gansu Sheng, Jilin Sheng, Liaoning Sheng, Shanxi Sheng, Shaanxi Sheng, Sichuan Sheng (n. & w.), Qinghai Sheng, Nei Mongol Zizhiqu, Ningxia Huizi Zizhiqu, Xinjiang Uygur Zizhiqu) EUROPE: Russian Federation-European part (European part (possibly non-native))
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 :
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.
Expert comment
Author
L.
Botanical References
5074
Links / References
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Subject : Urtica_cannabina
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