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Brassica rapa chinensis - (L.)Hanelt.
                 
Common Name Pak Choi
Family Brassicaceae or Cruciferae
USDA hardiness 6-9
Known Hazards None known
Habitats Not known in the wild.
Range A cultivar of garden origin.
Edibility Rating  
Other Uses  
Weed Potential No
Medicinal Rating  
Care
Fully Hardy Moist Soil Semi-shade Full sun

Summary

Brassica rapa chinensis Pak Choi


http://commons.wikimedia.org/wiki/File:Brassica_rapa_var._chinensis_(leaf).jpg
Brassica rapa chinensis Pak Choi
http://www.hear.org/starr/
   
Physical Characteristics
 icon of manicon of flower
Brassica rapa chinensis is a BIENNIAL growing to 0.9 m (3ft).
It is hardy to zone (UK) 7 and is not frost tender. It is in flower from May to August. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Bees, self.The plant is self-fertile.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils and prefers well-drained soil. Suitable pH: acid, neutral and basic (alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist soil.

Synonyms
B. chinensis. B. napus chinensis. (L.)Schulz. B. parachinensis.

Habitats
 Cultivated Beds;
Edible Uses
Edible Parts: Leaves;  Oil;  Stem.
Edible Uses: Oil.

Leaves - raw or cooked[46, 52, 61, 116]. They can be eaten at any stage from seedling to mature plant[206]. Well-flavoured, they are sweet with a hint of mustard[206].The leaves are also dried for winter use[206]. The leaves have pronounced stems and these can also be eaten, they tend to have a mild, almost bland flavour[206]. A nutritional analysis is available[218]. Immature flowering stems - cooked like broccoli[206]. A sweet flavour[206]. An edible oil is obtained from the seed.
Composition
Figures in grams (g) or miligrams (mg) per 100g of food.
Leaves (Dry weight)
  • 350 Calories per 100g
  • Water : 0%
  • Protein: 0g; Fat: 0g; Carbohydrate: 25g; Fibre: 14g; Ash: 12g;
  • Minerals - Calcium: 1700mg; Phosphorus: 500mg; Iron: 28mg; Magnesium: 0mg; Sodium: 420mg; Potassium: 5100mg; Zinc: 0mg;
  • Vitamins - A: 25000mg; Thiamine (B1): 0.6mg; Riboflavin (B2): 1.3mg; Niacin: 42mg; B6: 0mg; C: 700mg;
  • Reference: [ 218]
  • Notes: The figures given here are median figures from a fairly wide range that was given in the report.
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.

Antirheumatic;  Antiscorbutic;  Resolvent.

The leaf is antiarthritic, antiscorbutic and resolvent[218].
Other Uses
Oil.

None known
Cultivation details
Succeeds in full sun in a well-drained fertile preferably alkaline soil[200]. Prefers a pH of 5.5 to 7[200]. Tolerates a pH in the range 4.3 to 7.5. Prefers a cool moist reasonably fertile soil[52]. The plant is shallow rooted and intolerant of drought, it needs to be grown in a moist fertile soil for the best quality leaves[206]. Plants are not tremendously cold-hardy, though they will withstand light frosts[133]. Pak choi is widely cultivated, especially in China, for its edible leaves which are produced mainly in the summer and autumn. A fast-growing plant, there are many named varieties and some can be ready in as little as five weeks from sowing the seed[88, 206, 264]. Forms with green stems tend to stand up better to adverse conditions than white-stemmed forms[206].
Propagation
Seed - sow in situ May to August. Spring sown crops are prone to run quickly to seed if there is a spell of cold weather[206]. Some varieties can also be sown in a cold greenhouse in autumn or early spring to provide leaves overwinter and in late spring.
Other Names
Found In
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 :
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Brassica juncea integrifolia rugosaHead Mustard42
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Brassica juncea rugosaHead Mustard42
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Expert comment
 
Author
(L.)Hanelt.
Botanical References
200
Links / References
For a list of references used on this page please go here
Readers comment
 
Elizabeth H.
Sun Dec 2 2007
Pak Choi is considered a hybrid between amzazingly the radish (hint the leaves shapes apear to be similar to radish leaves) and cabbage
Elizabeth H.
Monk Vege Wed Jul 9 2008

Vegetable Fresh anf Green along the Day Various vagetable, fruite and herbs found in Bali

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Subject : Brassica rapa chinensis  

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