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Choy sum

Brassica rapa var. parachinensis

Also called Field Mustard, Turnip, Bird's Rape, Rape, Rape Mustard, Wild Mustard, Wild Turnip

Choy sum
Photo: Earth100, CC BY-SA 3.0

Choy sum is a leafy green vegetable in the cabbage family, grown for its tender stems and leaves and its yellow flowers. It is a fast-growing cool-season crop that bolts quickly in heat, so sow it in cooler weather for best results.

Family
Brassicaceae (Cabbage family)
Light
Full sun, Part shade
Water
Keep soil evenly moist; water at the base to avoid wet leaves.
Soil
Fertile, well-drained soil rich in organic matter, pH around 6 to 7.
Temperature
15–25 °C; bolts in hot weather above about 25 °C and tolerates light frost
How easy
Easy
Safety
Not known to be toxic
Edible
Yes, some parts

About

Choy sum (also spelled choi sum or choi sam in Cantonese; caixin (Chinese: 菜心; pinyin: càixīn) in Standard Mandarin) is a leafy vegetable commonly used in Chinese cuisine. It is a member of the genus Brassica of the mustard family, Brassicaceae (Brassica rapa var. parachinensis or Brassica chinensis var. parachinensis). Choy sum is a transliteration of the Cantonese name (Chinese: 菜心), which can be literally translated as "heart of the vegetable". Choy sum is also called yu choy (you cai in Standard Mandarin; Chinese: 油菜). It is also known as Chinese flowering cabbage.

Uses

Choy sum is highly valued as a vegetable in China and Japan. It is commonly consumed in soup, blanched, or stir-fried.

Other Brassica plants

Abyssinian mustard · Mustard · Zha cai · India mustard · Rutabaga · Rapeseed · Tatsoi · Rhamphospermum nigrum · Gai lan · Cauliflower · Cabbage · Brussels sprout

Text excerpted from the Wikipedia article Choy sum by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

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