Name: Water Knotweed, Longroot Smartweed, Water Smartweed, Willow Grass
Brand: NVK Nurseries
SKU: 4047-PL72
Price: 5.0 CAD
Availability: InStock

Water Knotweed, Longroot Smartweed, Water Smartweed, Willow Grass

Persicaria amphibia

A native perennial with ornamental blooms valued for pollinator support in naturalized and border settings.

Habitat includes shallow waters along lakes, ponds, ditches
Adaptable to short periods of drought
Long stems may creep, float or grow erect, before rooting at the stem nodes
Leaves can be lance-shaped or take various other shapes
Can grow in water depths up to 2.5 meters or less

Size

72 plugs per tray

50 plugs per tray

$5.00

Shipping calculated at checkout.

Quantity

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Plant Characteristics

Sunlight

Full sun, Partial shade, Shade

Soil Moisture

Moist, Wet

Hardiness Zone

4 – 4

Mature Height (meters)

0.3 – 1.25

Mature Spread (meters)

0.0 – 0.0

Growth Rate

Fast

Flower Colour

Pink

Foliage Colour

Green

Bloom Time

Fall

Habit

Spreading

Deer Resistant

✓

Rabbit Resistant

✓

Pollinator Friendly

✓

Ontario Native

✓

Landscape Uses

Rain garden, Mass planting

Growing & Maintenance Tips

Persicaria amphibiaare adaptable to various levels of water, including the ability to survive short periods of drought. They are suitable for naturalizing in storm sewer ponds and runoff ditches where water availability is inconsistent. Both terrestrial and aquatic versions may take on very different appearances.

Notes

Native to Ontario "Persica" is a latin word meaning "peach" and "aria" means pertaining to, which is referring to the similarity of the leaves.