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Summary
The leaves and stems of Amaranthus spinosus are eaten raw or cooked as a spinach. Remove the spines in older plants. Seed are easy to harvest and very nutritious. A native of tropical America and is found mainly in warm areas. Common names include: calaloo; needle burr; pigweed; prickly calaloo; prickly callau; prickly caterpillar; spiny amaranthus; spiny calaloo; spiny pigweed; sticker weed; thorny pigweed; wild callau. Spanish: bledo de espina; quelite espinoso. French: amarante épineuse; blette épineuse; brèche de Malabar; epinard malabre. Chinese: tsz-hsien.
Physical Characteristics
Amaranthus spinosus is a ANNUAL growing to 0.6 m (2ft) by 0.2 m (0ft 8in).
See above for USDA hardiness. It is hardy to UK zone 5 and is not frost tender. It is in leaf from April to October, in flower from July to September, 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 self-fertile.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils and prefers well-drained soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It cannot grow in the shade. It prefers moist soil.
UK Hardiness Map
US Hardiness Map
Synonyms
Plant Habitats
Cultivated Beds;
Edible Uses
Edible Parts: Leaves Seed
Edible Uses:
Leaves and stems - raw or cooked as a spinach[2, 61, 177]. If older leaves and stems are used the spines must be removed[183]. Highly esteemed[183]. The dried leaves contain (per 100g) 267 - 276 calories, 20 - 34.4% protein, 2 - 4.5% fat, 45 - 54% carbohydrate, 9.8 - 10.4% fibre, 16.6 - 24% ash, 1795 - 5333mg calcium, 333 - 460mg phosphorus, 13.5 - 152.7mg iron, 13 - 37mg sodium, 337 - 3528mg potassium, 27.9 - 40.8mg betacarotene equivalent, 0.06mg thiamine, 2.02mg riboflavin, 7.7 - 8.6mg niacin and 503mg ascorbic acid[218]. Seed - cooked. Very small, about 1mm in diameter[266], but easy to harvest and very nutritious. The seed can be cooked whole, and becomes very gelatinous like this, but it is rather difficult to crush all of the small seeds in the mouth and thus some of the seed will pass right through the digestive system without being assimilated[K]. a valued food plant in Africa. In Thai cuisine, where it is called phak khom and in Tamil mullik keerai.
References More on Edible Uses
Composition
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Figures in grams (g) or miligrams (mg) per 100g of food.
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Leaves (Dry weight)
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- 276 Calories per 100g
- Water : 0%
- Protein: 30g; Fat: 4.5g; Carbohydrate: 50g; Fibre: 10g; Ash: 20g;
- Minerals - Calcium: 5000mg; Phosphorus: 450mg; Iron: 100mg; Magnesium: 0mg; Sodium: 30mg; Potassium: 3000mg; Zinc: 0mg;
- Vitamins - A: 40mg; Thiamine (B1): 0.06mg; Riboflavin (B2): 2.02mg; Niacin: 8mg; B6: 0mg; C: 503mg;
- Reference: [ ]
- Notes:
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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.
Antidote Astringent Diaphoretic Dysentery Eczema Emmenagogue Emollient Febrifuge
Urinary VD
The seed is used as a poultice for broken bones[218]. The plant is astringent, diaphoretic, diuretic, emollient, febrifuge and galactogogue[4, 61, 147, 218, 238, 240, 272]. It is used internally in the treatment of internal bleeding, diarrhoea and excessive menstruation[238, 254]. It is also used in the treatment of snake bites[243]. Externally, it is used to treat ulcerated mouths, vaginal discharges, nosebleeds and wounds[238, 243]. The plant can be used fresh or it can also be harvested when coming into flower and dried for later use[238]. The root is emmenagogue and galactogogue[243]. A paste of the root is used in the treatment of menorrhagia, gonorrhoea, eczema and colic[243, 272]. It helps to remove pus from boils[272]. The juice of the root is used in Nepal to treat fevers, urinary troubles, diarrhoea and dysentery[272]. It is also used, often combind with the root juice of Dichrophela integra and Rubus ellipticus, to treat stomach disorders and, on its own, to treat indigestion and vomiting that occur after eating unusual foods[272].
References More on Medicinal Uses
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Other Uses
Dye
Yellow and green dyes can be obtained from the whole plant[168]. A red pigment obtained from the plant (the report does not specify which part of the plant) is used as a colouring in foods and medicines[238].
Special Uses
Dynamic accumulator
References More on Other Uses
Cultivation details
Prefers a well-drained fertile soil in a sunny position[200]. Requires a hot sheltered position if it is to do well[K]. Plants should not be given inorganic fertilizers, see notes above on toxicity. Most if not all members of this genus photosynthesize by a more efficient method than most plants. Called the 'C4 carbon-fixation pathway', this process is particularly efficient at high temperatures, in bright sunlight and under dry conditions[196].
References Carbon Farming Information and Carbon Sequestration Information
Temperature Converter
Type a value in the Celsius field to convert the value to Fahrenheit:
Fahrenheit:
The PFAF Bookshop
Plants For A Future have a number of books available in paperback and digital form. Book titles include Edible Plants, Edible Perennials, Edible Trees,Edible Shrubs, Woodland Gardening, and Temperate Food Forest Plants. Our new book is Food Forest Plants For Hotter Conditions (Tropical and Sub-Tropical).
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Plant Propagation
Seed - sow late spring in situ. An earlier sowing can be made in a greenhouse and the plants put out after the last expected frosts. Germination is usually rapid and good if the soil is warm[133]. A drop in temperature overnight aids germination[133]. Cuttings of growing plants root easily[206].
Other Names
If available other names are mentioned here
Native Range
Coming Soon
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 for a number of crops including beans, coffee, cotton, cowpeas, mangoes, maize,mulberries, oil palms, papayas, pineapples, rice, sorghum, soyabeans, sugarcane, sweet potatoes, tobacco, and vegetables. it is a noted weed in Angola, Brazil, El Salvador, Ghana, Hawaii, India, Indonesia, Malaysia, Mexico, Mozambique, Nicaragua, Peru, Philippines, South Africa, Sri Lanka, Taiwan , Thailand, and USA.
Conservation Status
IUCN Red List of Threatened Plants Status : This taxon has not yet been assessed.
Related Plants
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Latin Name | Common Name | Habit | Height | Hardiness | Growth | Soil | Shade | Moisture | Edible | Medicinal | Other |
Amaranthus albus | Prostrate Pigweed | Annual | 0.7 |
8-10
| | LMH | N | M | 2 | 0 | 1 |
Amaranthus bidentata | | Annual | 0.9 |
-
| | LMH | N | M | 2 | 1 | 1 |
Amaranthus blitoides | Mat Amaranth | Annual | 0.2 |
6-10
| | LMH | N | M | 2 | 0 | 1 |
Amaranthus blitum | Slender Amaranth, Purple amaranth | Annual | 1.0 |
4-8
| | LMH | N | M | 4 | 2 | 2 |
Amaranthus campestris | | Annual | 0.0 |
-
| | LMH | N | M | 2 | 1 | 1 |
Amaranthus caudatus | Love Lies Bleeding | Annual | 2.0 |
4-8
| | LMH | N | DM | 4 | 1 | 2 |
Amaranthus cruentus | Purple Amaranth, Red amaranth | Annual | 2.0 |
3-11
| | LMH | N | M | 4 | 2 | 2 |
Amaranthus diacanthus | | Annual | 0.0 |
-
| | LMH | N | M | 2 | 0 | 1 |
Amaranthus dubius | Spleen Amaranth | Annual | 1.0 |
-
| | LMH | N | M | 2 | 0 | 1 |
Amaranthus frumentaceus | | Annual | 0.0 |
-
| | LMH | N | M | 2 | 0 | 1 |
Amaranthus graecizans | Spreading Pigweed, Mediterranean amaranth | Annual | 0.5 |
0-0
| | LMH | N | M | 2 | 0 | 1 |
Amaranthus hybridus | Rough Pigweed, Slim amaranth | Annual | 2.0 |
6-12
| | LMH | N | M | 4 | 1 | 1 |
Amaranthus hypochondriacus | Prince's Feather, Prince-of-wales feather | Annual/Perennial | 1.2 |
3-10
| | LMH | N | M | 4 | 3 | 2 |
Amaranthus mangostanus | | Annual | 1.5 |
-
| | LMH | N | M | 2 | 0 | 1 |
Amaranthus mitchellii | Boggabri Weed | Annual | 0.5 |
-
| | LMH | N | M | 2 | 0 | 1 |
Amaranthus pallidiflorus | | Annual | 1.0 |
-
| | LMH | N | M | 2 | 0 | 1 |
Amaranthus palmeri | Careless Weed | Annual | 0.9 |
7-12
| | LMH | N | M | 2 | 0 | 1 |
Amaranthus polygamus | | Annual | 0.0 |
-
| | LMH | N | M | 2 | 1 | 1 |
Amaranthus polystachyus | | Annual | 0.0 |
-
| | LMH | N | M | 2 | 0 | 1 |
Amaranthus powellii | Powell's Amaranth | Annual | 1.8 |
6-11
| | LMH | N | M | 2 | 0 | 1 |
Amaranthus quitensis | Ataco | Annual | 1.0 |
-
| | LMH | N | M | 2 | 0 | 1 |
Amaranthus retroflexus | Pigweed, Redroot amaranth, Wild Beet | Annual | 0.9 |
3-11
| | LMH | N | M | 3 | 2 | 2 |
Amaranthus standleyanus | Indehiscent Pigweed | Annual | 0.7 |
-
| | LMH | N | M | 2 | 0 | 1 |
Amaranthus tenuifolius | | Annual | 0.0 |
-
| | LMH | N | M | 2 | 0 | 1 |
Amaranthus thunbergii | Thunberg's Pigweed, Thunberg's amaranthus | Annual | 0.5 |
0-0
| | LMH | N | M | 2 | 0 | 1 |
Amaranthus torreyi | Torrey's amaranthus | Annual | 0.8 |
0-0
| | LMH | N | M | 2 | 0 | 1 |
Amaranthus tricolor | Chinese Spinach, Joseph's-coat, Fountain Plant, Tampala , Summer Poinsettia | Annual | 1.0 |
3-11
| M | LMH | N | M | 3 | 1 | 2 |
Amaranthus viridis | Calalu, Slender amaranth | Annual | 0.5 |
7-11
| | LMH | N | M | 3 | 2 | 1 |
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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
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Botanical References
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