Giant Knotweed (Reynoutria Sachalinensis) is a perennial herb in the Polygonaceae family with moderate care difficulty. It requires moderate watering and full sun or partial shade light in USDA hardiness zones 4-9. This plant is safe for cats and dogs.

Reynoutria sachalinensis, commonly known as Giant Knotweed, is a large herbaceous perennial plant known for its extensive rhizomatous root system and large heart-shaped leaves.

Giant Knotweed

Giant Knotweed

Reynoutria Sachalinensis

Reynoutria sachalinensis, commonly known as Giant Knotweed, is a large herbaceous perennial plant known for its extensive rhizomatous root system and large heart-shaped leaves.

Quick Facts

Type
herb
Lifecycle
perennial
Care Difficulty
Moderate
Water Needs
Moderate
Light
Full Sun, Partial Shade
Hardiness Zones
4-9

Safety

🐕
Pet Safe
👶
Child Safe
Non-Toxic

Growing Conditions

Soil Types:clay, loamy, sandy
Indoor:No
Outdoor:Yes
Garden Use:erosion control, groundcover

Care Calendar

Monthly care tasks for Giant Knotweed

Jan
Prune
Feb
Fertilize
Mar
Repot
Apr
Water+
May
...
Jun
...
Jul
...
Aug
...
Sep
...
Oct
...
Nov
...
Dec
...

Expert Care Tips

Pro tips from botanists and plant experts

Watering Tip

Check soil moisture by inserting your finger 1 inch deep. Water only when the top layer feels dry to prevent overwatering.

Humidity Trick

Group plants together to create...

Growth Hack

Rotate your plant every...

Photo Gallery10+ photos

Giant Knotweed
Giant Knotweed detail

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Taxonomy

Family:Polygonaceae
Genus:Reynoutria