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Polygonum odoratum

Also Known As

  • Persicaria odorata
  • Rau Ram
  • Vietnamese Cilantro
  • Vietnamese Coriander

Plant type

perennial, herb

size

  • H: 24"-36"
  • W: 12"-15"

planting zones

  • 9a-11

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Polygonum odoratum plant details

Polygonum odoratum is a broadleaf semi-evergreen perennial herb with green foliage. In summer pink flowers emerge. Grows well with mostly sun - mostly shade and even moisture - regular water. Does well in average and well-drained soil.

CHARACTERISTICS OF Polygonum odoratum

Plant type: perennial herb
Plant family: polygonaceae
Foliage: semi-evergreen green
Mature size: 12 IN - 15 IN - wide, 24 IN - 36 IN - tall
Flowers: pink blooms in summer
Uses: container plant

GROWING CONDITIONS for Polygonum odoratum

USDA Zones: 9a - 11
Sun exposure: mostly sun - mostly shade
Watering frequency: even moisture - regular
Soil needs: average and well-drained

Nursery contributed plant descriptions

Green pointed leaves great in salads, salsas, or as a garnish. use as a substitute for cilantro. spreading growth habit
I encountered this herb many years ago when I shared a community garden with a group of Cambodian gardeners. It was a pretty little thing with trailing stems & green leaves with a dark colored blotch & the young leaves were used interchangeably with peppermint & regular cilantro in soups, stews & salads. Other cooks have found it useful in Mexican foods like salsa & ceviche. Old leaves get tough & a bit acrid, so the Cambodians would cut the plant back repeatedly to get flavorful new leaves. Unlike cilantro, it will never bolt & retains its flavor well when dried. I took a plant home & learned that unless you eat a LOT of it, Rau ram should be grown in pot where its rampant growth can be contained. Repot often since it will stop producing new leaves when pot-bound. Naturally an understory groundcover, it should be grown with afternoon shade/all day filtered shade & plenty of water. A high nitrogen fertilizer is also helpful. A tropical herb, it will die back in light frost but will re-sprout again the Spring. In areas with heavier frost, the plant can be overwintered indoors.

By: Annie's Annuals & Perennials

Gardening facts about Polygonum odoratum plant

How to Grow Polygonum odoratum

  • Sun Exposure

    • mostly sun - mostly shade
  • Water Needs

    • even moisture - regular
  • Soil Needs

    • average
    • well-drained

Features

  • Foliage Color

    • green
  • Flower Color

    • pink
  • Flower Season

    • summer
  • Foliage Season

    • semi-evergreen

See other plant types of Polygonum for your garden

aka Polygonum cuspidatum 'Crimson Beauty', Crimson Beauty Clumping Mexican Bamboo, Crimson Mexican Bamboo, False Bamboo

Plant Type

Perennial

Zones

5a-9b

Size

Height: 5'-7'

Width: 5'-7'

  • sun - mostly shade
  • regular - occasional
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aka Polygonum cuspidatum 'Freckles', Freckles Mexican Bamboo

Plant Type

Perennial

Zones

5a-9b

Size

Height: 5'-6'

Width: 5'-6'

  • sun - mostly shade
  • regular - occasional
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aka Persicaria capitala, Pink Buttons Smartweed

Plant Type

Perennial

Zones

7b-10b

Size

Height: 3"

Width: 12"

  • sun - mostly shade
  • occasional
Photo of Polygonum capitatum 'Pink Buttons' flower by J.G. in SF
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aka Polygonum orientale, Kiss Me Over The Garden Gate, Kiss-Me-Over-The-Garden-Gate

Plant Type

Annual / Biennial

Zones

1-12

Size

Height: 3'-6'

Width: 5'

  • sun - mostly sun
  • regular
Photo of Persicaria orientalis flower by Annie's Annuals & Perennials
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aka Polygonum polymorphum, Giant Fleeceflower, White Fleece Flower

Plant Type

Perennial

Zones

4a-9b

Size

Height: 6'-8'

Width: 5'

  • sun - mostly shade
  • even moisture - drought tolerant
Photo of Persicaria polymorpha by Patricia Cunningham
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