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Fallopia sachalinensis

Fallopia sachalinensis
Giant Knotweed

1,0/5
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1 reviews

Attention, invasive plant, it's a variety of Japanese Knotweed, it is extremely difficult to eradicate once established. I don't understand how this plant can be sold on the Internet when it is classified as a harmful and invasive species.

Dominique, 31/07/2019

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This plant carries a 6 months recovery warranty

More information

The Fallopia sachalinensis, with spikes of white flowers at the end of the season.
Height at maturity
2.50 m
Spread at maturity
1.50 m
Exposure
Sun, Partial shade, Shade
Hardiness
Hardy down to -29°C
Soil moisture
Moist soil, Damp soil
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Best planting time February to March, September to October
Recommended planting time February to April, September to November
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Flowering time September to November
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Description

These perennial plants, formerly classified as Polygonum and then renamed Reynoutria, may have finally found their definitive name. With great vigor, they can become very invasive. Some have even naturalized in Europe to the point of supplanting local weeds when conditions are favorable.

Superb plants with sucker-producing rhizomes from which emerge in spring robust stems that can exceed 3 meters (10 feet) in height. The heart-shaped leaves are matte green. White spike flowers appear late in the season. Very easy to cultivate in any moist, even damp, heavy and clayey soil, in the sun or in the shade.

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Fallopia sachalinensis in pictures

Fallopia sachalinensis (Flowering) Flowering
Fallopia sachalinensis (Foliage) Foliage
Fallopia sachalinensis (Plant habit) Plant habit

Plant habit

Height at maturity 2.50 m
Spread at maturity 1.50 m
Growth rate normal

Flowering

Flower colour white
Flowering time September to November

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Botanical data

Genus

Fallopia

Species

sachalinensis

Family

Polygonaceae

Other common names

Giant Knotweed

Origin

Cultivar or hybrid

Product reference7716301

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Planting and care

Available to order
17,50 €
Available to order
9,90 € Tin

Planting period

Best planting time February to March, September to October
Recommended planting time February to April, September to November

Intended location

Type of use Border, Free-standing
Hardiness Hardy down to -29°C (USDA zone 5) Show map
Planting density 1 per m2
Exposure Sun, Partial shade, Shade
Soil pH Neutral
Soil moisture Moist soil, Damp soil

Care

Soil moisture Moist soil, Damp soil
Overwinter Can be left in the ground
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