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.

Taxonomy

Imperata cylindrica
Imperata
Poaceae
Poales

Also known as

Sharp grass, Cogongrass and Kunai grass

How to care for Cogon Grass

💦 Water

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
9

Does your plant get direct sunlight?

Select the pot size

5"
☀️ Light

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 🏡.

🪴 Nutrients

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.

💡 FAQs
⭐ 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!

Benefits of Growing Cogon Grass →

Common Cogon Grass Problems →


💦 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.

Cogon Grass Water Frequency →

Cogon Grass Root Rot →


☀️ 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 💪. Select your region to see how the current weather in your area affects the placement in your home 🏡.

Cogon Grass Light Requirements →

Cogon Grass Direct Sunlight Needs & Tolerance →


🐶 🐈 👶 Toxicity

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.


🪴 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!

Best Soil Mix for Cogon Grass →

When and How to Successfully Repot Cogon Grass →


💩 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.

How and When to Prune Cogon Grass →


🌦️ Growing Outdoors

USDA Hardiness Zone
Cogon Grass can be grown outdoors in USDA Hardiness Zones 5a-9b. Find your local hardiness zone here.

Cogon Grass Temperature Tolerance →


🌱 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

🧐 Troubleshooting

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.


Care Summary for Cogon Grass

Cogon Grass

Cogon Grass


Greg recommends:

Water

0.5 cups every 9 days

Placement

< 1ft from a window

Nutrients

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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