Plant Care Black Oat Grass

Black Oat Grass

Also known as

blackseed needlegrass, black-seed speargrass, black bunchgrass, black oatgrass and black-seed needlegrass


Piptochaetium avenaceum

How to care for Black Oat Grass


How often to water your Black Oat Grass

Water needs for Black Oat Grass
0.5 cups
every 9

Black Oat 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.

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 Black Oat Grass in your home

Light needs and placement for plant Black Oat Grass: 3ft from a window
3ft or less from
a window

Black Oat Grass may have difficulty thriving, and will drop leaves 🍃, without ample sunlight.

Place it less than 3 feet from a south-facing window to maximize the potential for growth.

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


How to fertilize Black Oat Grass

Nutrient, fertilizer, and repotting needs for Black Oat 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 Black Oat Grass after it doubles in size or once a year—whichever comes first.

Care Summary for Black Oat Grass

Black Oat Grass

Greg recommends:


0.5 cups every 9 days


< 3ft 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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