Try for Free
tab list
PictureThis
English
arrow
English
繁體中文
日本語
Español
Français
Deutsch
Pусский
Português
Italiano
한국어
Nederlands
العربية
Svenska
Polskie
ภาษาไทย
Bahasa Melayu
Bahasa Indonesia
PictureThis
Search
Search Plants
Try for Free
Global
English
English
繁體中文
日本語
Español
Français
Deutsch
Pусский
Português
Italiano
한국어
Nederlands
العربية
Svenska
Polskie
ภาษาไทย
Bahasa Melayu
Bahasa Indonesia
This page looks better in the app
picturethis icon
Instantly identify plants with a snap
Snap a photo for instant plant ID, gaining quick insights on disease prevention, treatment, toxicity, care, uses, and symbolism, etc.
Download the App for Free picturethis icon
Continue Reading
cover

How to Grow and Care for Japanese knotweed

Japanese knotweed, also known as Asian knotweed, Fleeceflower, Huzhang, Hancock's curse, Donkey rhubarb, Mexican bamboo

Hearing the name of japanese knotweed can strike fear in the heart of homeowners. When this aggressive and invasive weed is identified on a property, mortgage lenders sometimes deny loans or demand extensive chemical treatment. This is due to the fact that the root system of japanese knotweed is so extensive that once established, it can be nearly impossible to eradicate.

Icon water title

Watering schedule: Every week

Icon water title

Sunlight Requirements: Full sun

In This Article

Planting and Growing Japanese knotweed

LifespanPerennial
Watering ScheduleEvery week
Sunlight RequirementsFull sun
Soil pH5.5-7
Planting TimeSpring, Fall
Hardiness Zones
4-10
Icon code

Scan QR code to download

Common Pests & Diseases

Common issues for Japanese knotweed based on 10 million real cases

Plant disease auto-diagnose & prevention
AI-powered plant doctor helps you diagnose plant problems in seconds.
Download the App for Free

More General Info About Japanese knotweed

Quickly Identify Japanese knotweed

Instantly identify plants with a snap
Snap a photo for instant plant ID, gaining quick insights on disease prevention, treatment, toxicity, care, uses, and symbolism, etc.
Download the App for Free
Japanese knotweed displays heart-shaped green leaves that can reach up to 6 inches (15 cm) in length, with a pointed tip and a slightly rippled edge. The stems are hollow and bamboo-like, typically growing 6 to 9 feet (about 2 to 3 meters) tall. During late summer, japanese knotweed produces small, creamy white flowers in branched clusters. The plant is highly robust, with a deep and vigorous rhizome system that can push through hard surfaces.
Japanese knotweed identify imageJapanese knotweed identify imageJapanese knotweed identify imageJapanese knotweed identify imageJapanese knotweed identify image
Learn More About Identifying Japanese knotweed

More Info on Japanese knotweed Growth and Care

Cultivate a Thriving Garden with PictureThis Guidance
Keep your plants happy and healthy with our guide to watering, lighting, feeding and more!
Download the App for Free
image

Plants with Same Care Needs

close
close
Your Ultimate Guide to Plants
Identify grow and nurture the better way!
product icon
17,000 local species +400,000 global species studied
product icon
Nearly 5 years of research
product icon
80+ scholars in botany and gardening
ad
ad
Botanist in your pocket
qrcode
PictureThis Ios DownloadPictureThis Android Download
Scan the QR code with your phone camera to download the app