Plant Care Giant Reed

Giant Reed

About Giant Reed

This plant is best grown in a 5-20 gallon container and covered with 1-6 inches of water. Best suited for large water gardens. Very invasive and difficult to eradicate. Less cold-hardy than some of its counterparts.


Arundo donax

Also known as

Giant reed grass, Giant cane, Elephant grass, Carrizo, Arundo, Spanish cane, Colorado river reed and Wild cane

How to care for Giant Reed


How often to water your Giant Reed

Water needs for Giant Reed
0.5 cups
every 9

Giant Reed 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 Giant Reed

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 Giant Reed in your home

Light needs and placement for plant Giant Reed: 1ft from a window
1ft or less from
a window

Giant Reed love being close to bright, sunny windows 😎.

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

Giant Reed does not tolerate low-light 🚫.

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


How to fertilize Giant Reed

Nutrient, fertilizer, and repotting needs for Giant Reed: 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 Giant Reed after it doubles in size or once a year—whichever comes first.

Difficulty Level

Giant Reed 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 Giant Reed

Giant Reed

Giant Reed

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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