Cogon Grass
About Cogon Grass
Japanese Bloodgrass is a perennial variety of cogongrass. It is considered one of the 10 worst weeds in the world. It has invaded 153 billion acres worldwide and over one million acres in Florida, displacing native species of plants. The red form is not invasive but can revert back to the green form which is aggressive.
Taxonomy
Imperata cylindrica
Imperata
Poaceae
Poales
Also known as
Sharp grass, Cogongrass and Kunai grass

How to care for Cogon Grass

How often to water your Cogon Grass

every 9
Cogon Grass needs 0.5 cups of water every 9 when it doesnāt get direct sunlight and is potted in a 5" pot.
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
9

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.

Select a city to check sunlight intensity

Finding light for Cogon Grass in your home

a window
Cogon Grass love being close to bright, sunny windows š.
Place it less than 1ft from a south-facing window to maximize the potential for growth.
Cogon Grass does not tolerate low-light š«.
Select your region to see how the current weather in your area affects the placement of Cogon Grass in your home š”.

How to fertilize Cogon Grass

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 itās likely grown enough to need a larger pot anyway.
To replenish this plant's nutrients, repot your Cogon Grass after it doubles in size or once a yearāwhichever comes first.

Cogon Grass is generally easy to care for, though some plant parents report facing challenges with growing it. Check out the reviews down below to read more about their experiences!
Water Needs
Cogon Grass 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.
Sunlight Needs
Cogon Grass requires abundant, bright and direct light. Place it less than one foot from a window to ensure it receives enough light to survive šŖ. Select your region to see how the current weather in your area affects the placement in your home š”.
Toxicity
Greg does not have confirmed data on this plantās toxicity. If you, a family member, or a pet consumes plant material of unknown toxicity, itās always best to consult a medical professional.
If you or someone else ingested this plant, call Poison Control atĀ US (800) 222-1222.Ā If a pet consumed this plant, contact your veterinarian or the ASPCA atĀ US (888) 426-4435.
Soil
Cogon Grass 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!
Fertilizer
Cogon Grass is a fast growing plant and may deplete the nutrients in its soil over time. Replenish them with a gentle organic fertilizer or compost every 1-2 months depending on your location and season. Fertilize more often during the growing season and in warmer and brighter climates.
Growth Pattern
Cogon Grass is a clumping plant, meaning new growth will emerge from the soil around the parent plant.
Growing Outdoors
USDA Hardiness Zone
Cogon Grass can be grown outdoors in USDA Hardiness Zones 5a-9b. Find your local hardiness zone here.
Propagation
Cogon Grass can be propagated by division into new individual plants.
- Check to see if there is more than one plant. In some cases they may still be beneath the soil surface. If you feel confident, you may remove the soil to check for baby plantlets below!
- If there are multiple plants growing, unpot the plant and gently tug the plants apart, being careful not to disturb too many of the roots. They may be connected by large root segments which you may need to break to free the plantlet.
- Pot up the new plant in well-draining soil
- Repot the parent plant back into its original pot
Care Summary for Cogon Grass
Cogon Grass
Greg recommends:

0.5 cups every 9 days

< 1ft from a window

Repot after 2x growth
Based on the 4ā pot your plant is in, and that it doesnāt get direct sunlight.
