InBonsai

Culinary Herbs

VIETNAMESE CORIANDER

(Polygonum odoratum)

Vietnamese coriander (Rau Ram) is a very common spice in daily life. Its leaves have a pleasant aroma, essential in dishes like shredded chicken salad, clam porridge, and balut.

Culinary Herbs

Temperate
Moist
Loam

Care Notes

Cuttings

Water Needs

Prefers wet environment
Vietnamese Coriander

VIETNAMESE CORIANDER

Polygonum odoratum

High
Economic Efficiency
35-40
Days to Harvest

1. Characteristics

Herbaceous, reddish-purple stems, creeping. Fascicled roots. Leaves green above, purplish below.

Moisture: 90%

2. Uses

Spice/Herb (soups, salads...) and Medicinal (indigestion, sunstroke).

Popularity: 95%

3. Technique

Year-round (best in Spring-Summer). Wet/Mud soil. Healthy stem cuttings.

I. Uses & Benefits

Vietnamese coriander is a common spice. Stems and leaves have a pleasant aroma, used in shredded chicken salad, clam porridge, balut, and bun thang...

Medicinal Value: Used to treat indigestion, sunstroke, scabies, and impetigo.

II. Biological Characteristics

  • Stems & Roots: Herbaceous, reddish-purple creeping stems, 25-30cm high. Fascicled roots grow from nodes.
  • Leaves: Green on top, reddish-purple underneath, alternate arrangement, very short petioles.
  • Climate: Prefers warm, temperate climate. Intolerant to extreme heat or cold.
  • Environment: Loves moist environments; grows well in light loam and medium loam soils.

III. Cultivation Techniques

1. Season & Soil

  • Season: Year-round in temperate climates. Best in Spring-Summer (Jan-Feb) or late Feb to mid-Mar. Late planting reduces yield.
  • Soil: Well-ploughed, weed-free. Can be grown in wet soil (like rice paddies) or mud. Beds 1.1-1.5m wide.

2. Fertilizers

  • Organic: 1.0 - 1.5 tons (Decomposed)
  • NPK: 30 - 40 kg
  • Superphosphate: 25 - 30 kg
  • Potash: 15 - 20 kg (or 100-150kg wood ash)

* Basal application: All organic, superphosphate, and 1/3 potash mixed into soil before planting.

3. Planting & Care

  • Planting: Propagated by stem. Choose healthy cuttings, 14-15cm long. - Spacing: 10-12cm x 7-10cm. 2-3 shoots per hole. - Bury 1/3 of the cutting (2-3 nodes) in soil.
  • Care: - Watering: Keep moist. Can use flood irrigation. - Top dressing: Apply NPK (7-10kg) when new leaves appear. Rinse leaves after applying fertilizer. - Add Potash mid-season during strong growth.
  • Pests: Few pests. Use biological or herbal measures if necessary.

IV. Harvest & Propagation

  • Harvest: 35-40 days after planting or when canopy closes. - Method: Select plants or cut across the field leaving 5-6cm base.
  • Propagation: Crop rotation recommended. Collect poor-growing plants and replant in a fixed area for seedlings (Summer-Autumn).

Conditions

Fertilizer per 1,000m²: Organic: 1.0 - 1.5 tons (Decomposed) NPK: 30 - 40 kg Superphosphate: 25 - 30 kg Potash: 15 - 20 kg (or 100-150kg wood ash) * Basal application: All organic, superphosphate, and 1/3 potash mixed into soil before planting. 3. Planting & Care Planting: Propagated by stem. Choose healthy cuttings, 14-15cm long. - Spacing: 10-12cm x 7-10cm. 2-3 shoots per hole. - Bury 1/3 of the cutting (2-3 nodes) in soil. Care: - Watering: Keep moist. Can use flood irrigation. - Top dressing: Apply NPK (7-10kg) when new leaves appear. Rinse leaves after applying fertilizer. - Add Potash mid-season during strong growth. Pests: Few pests. Use biological or herbal measures if necessary. IV. Harvest & Propagation Harvest: 35-40 days after planting or when canopy closes. - Method: Select plants or cut across the field leaving 5-6cm base. Propagation: Crop rotation recommended. Collect poor-growing plants and replant in a fixed area for seedlings (Summer-Autumn). Fertilizers (per 1,000m²) 1-1.5 Tons Organic 30-40 kg NPK 25-30 kg Superphosphate 15-20 kg Potash Growth Process Planting

Spring-Summer - Stem cuttings.

Care

Keep wet, fertilize.

First Harvest

35-40 days.

Subsequent Harvests

Cut leaving 5-6cm.