Plant Care Cogon Grass

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.


Imperata cylindrica

Also known as

Sharp grass, Cogongrass and Kunai grass

How to care for Cogon Grass


How often to water your Cogon Grass

Water needs for Cogon Grass
0.5 cups
every 9

Cogon Grass needs 0.5 cups of water every 9 when it doesn’t 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.

Calculate water needs of Cogon Grass

Water 0.5 cups every

Does your plant get direct sunlight?

Select the pot size


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

Light needs and placement for plant Cogon Grass: 1ft from a window
1ft or less from
a window

Cogon Grass love being close to bright, sunny windows 😎.

Place it less than 1ft from a south-facing window to maximize the potential for growth.

Cogon Grass does not tolerate low-light 🚫.

Select your region to see how the current weather in your area affects the placement of Cogon Grass in your home 🏡.


How to fertilize Cogon Grass

Nutrient, fertilizer, and repotting needs for Cogon Grass: repot after 2X growth

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 Cogon Grass after it doubles in size or once a year—whichever comes first.

Difficulty Level

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
Sunlight Needs
Growth Pattern
Growing Outdoors

Care Summary for Cogon Grass

Cogon Grass

Cogon Grass

Greg recommends:


0.5 cups every 9 days


< 1ft from a window


Repot after 2x growth

Based on the 4” pot your plant is in, and that it doesn’t get direct sunlight.

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