Also known as
German-knotweed, annual knawel and knawel
How to care for German Knotgrass
How often to water your German Knotgrass
German Knotgrass needs 0.5 cups of water every 9 when it doesn’t get direct sunlight and is potted in a 5" pot located in Madison, Wisconsin.
Use our water calculator to personalize watering recommendations to your environment or download Greg for more advanced recommendations for all of your plants.
Water 0.5 cups every
Check the growing potential in your area
A plant's growing potential is determined from its location, the time of year, and current local weather.
35% Very Low
Finding light for German Knotgrass in your home
German Knotgrass love being close to bright, sunny windows 😎.
Place it less than 1ft from a south-facing window to ensure it receives enough light to survive during this time of reduced sunlight intensity in Madison, Wisconsin ⛅.
German Knotgrass does not tolerate low-light 🚫.
How to fertilize German Knotgrass
Most potting soils come with ample nutrients which plants use to produce new growth.
By the time your plant has depleted the nutrients in its soil it’s likely grown enough to need a larger pot anyway.
To replenish this plant's nutrients, repot your German Knotgrass after it doubles in size or once a year—whichever comes first.
German Knotgrass 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.
German Knotgrass 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 🏡.
Greg does not have confirmed data on this plant’s toxicity. If you, a family member, or a pet consumes plant material of unknown toxicity, it’s always best to consult a medical professional.
If you or someone else ingested this plant, call Poison Control at US (800) 222-1222. If a pet consumed this plant, contact your veterinarian or the ASPCA at US (888) 426-4435.
German Knotgrass does best in well-draining soil. A good soil will contain lots of organic matter such as coco coir as well as perlite or vermiculite to help with drainage. Adding a handful of perlite to regular store-bought potting soil should do the trick!
German Knotgrass grows along the ground and sends out shoots which will spread across the soil.
Care Summary for German Knotgrass
0.5 cups every 9 days
< 1ft from a window
Repot after 2x growth
Based on your location in Madison, Wisconsin, the 4” pot your plant is in, and that it doesn’t get direct sunlight.