American Knotweed

American Knotweed prefers for the soil to dry out between waterings and should be watered regularly. Use our water calculator to personalize watering recommendations to your environment or download Greg for more advanced recommendations for all of your plants.

American Knotweed Water Frequency →

American Knotweed Root Rot →

American Knotweed requires abundant, bright and direct light. Place it less than one foot from a window to ensure it receives enough light to survive 💪. Select your region to see how the current weather in your area affects the placement in your home 🏡.

American Knotweed Light Requirements →

American Knotweed Direct Sunlight Needs & Tolerance →

American Knotweed is not known to cause harm to humans or pets. Regardless, if you, a family member, a cat, or dog has ingested any plant material, please consult a doctor or a veterinarian.

Is American Knotweed Edible? →

American Knotweed Toxicity to Cats →

American Knotweed Toxicity to Dogs →

American Knotweed Toxicity to Humans →

American Knotweed is very sensitive to dry soil, so choose a potting soil that retains moisture. A good soil will still drain well and contain lots of organic matter such as coco coir or sphagnum moss.

Best Soil Mix for American Knotweed →

When and How to Successfully Repot American Knotweed →

What Are Healthy American Knotweed Roots →

American Knotweed grows very slowly and doesn’t require added fertilizer. Replacing your plant’s potting soil once a year should provide them with more than enough nutrition. Remember, plants get their energy from sunlight, not fertilizer!

How Much and When to Fertilize American Knotweed →

American Knotweed grows along the ground and sends out shoots which will spread across the soil.

American Knotweed Lifecycle →

American Knotweed Size Guide →

How and When to Prune American Knotweed →

USDA Hardiness Zone
American Knotweed can be grown outdoors in USDA Hardiness Zones 3a-9b. Find your local hardiness zone here.

American Knotweed Temperature Tolerance →

American Knotweed Hardiness Zones →

Is American Knotweed a Weed? →

The seeds of American Knotweed can be used to grow new plants! After your plant flowers, any seeds that formed can be collected and germinated in potting soil.

How to Propagate American Knotweed →

Yellow leaves aren’t always a reason to panic, and can be a normal part of a plant’s life cycle. Unless brand new leaves are turning yellow or all the leaves change color at once, it’s likely just your plant shedding old leaves.

Overwatering and root rot are the most likely cause of problems in American Knotweed, since they are sensitive to wet soil. The leaves may also appear to be curling or drooping. Less often, yellow leaves are caused by underwatering, nutrient deficiencies, or pests.

Replace soggy soil with fresh, dry soil and download Greg to make sure your plant never gets overwatered again!

When troubleshooting a sad-looking houseplant, start by checking for signs of distress in its leaves, such as yellowing, browning, or drooping, which can indicate overwatering or nutrient deficiencies.

Inspect the soil moisture; too dry or too wet soil can cause problems.

Ensure the plant is getting the right amount of light, as too much or too little can stress it.

Finally, consider environmental factors like temperature and humidity, and adjust care routines accordingly to revive your plant.

• Common Bugs Affecting American Knotweed →

What Eats American Knotweed? →

• Drooping American Knotweed Leaves →
• American Knotweed Dropping Leaves →
• American Knotweed Mushy Leaves →
• Black Spots on American Knotweed →
• Brown Spots on American Knotweed →
• American Knotweed Leaves Falling Over →
• American Knotweed Leaves Curling →
• American Knotweed Yellow Leaves →
• American Knotweed Root Rot →
• Why Is My American Knotweed Wilting? →