Plant Care Cow's Horn

Cow's Horn

5.0 out of 5 (1 experiences)

Cow's Horn has a Fast grower plant personality Fast grower
Cow's Horn has a Survivor plant personality Survivor

About Cow's Horn

Cow's Horn is a super rare houseplant 🌿 that needs very little water to thrive. They do best in long-lasting, direct light ☀️ and should be less than 1 foot from a window.

Plant parents describe this plant as a fast grower and being a survivor with only 5 being grown with Greg around the world. Check out the reviews below for more details!🌟

Cow's Horn likes soil that is extremely well-draining. Your plant shouldn't need added fertilizers if you repot each time it doubles in size.


Euphorbia grandicornis

Also known as

Big Horn

How to care for Cow's Horn


How often to water your Cow's Horn

Water needs for Cow's Horn
0.5 cups
every 12

Cow's Horn needs 0.5 cups of water every 12 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 Cow's Horn

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 Cow's Horn in your home

Light needs and placement for plant Cow's Horn: 1ft from a window
1ft or less from
a window

Cow's Horn love being close to bright, sunny windows 😎.

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

Cow's Horn does not tolerate low-light 🚫.

Select your region to see how the current weather in your area affects the placement of Cow's Horn in your home 🏡.


How to fertilize Cow's Horn

Nutrient, fertilizer, and repotting needs for Cow's Horn: 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 Cow's Horn after it doubles in size or once a year—whichever comes first.

Water Needs
Sunlight Needs
Native Region

Care Summary for Cow's Horn

Cow's Horn

Cow's Horn

Greg recommends:


0.5 cups every 12 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.

What other plant parents say

Cow's Horn has a Fast grower plant personality Fast grower 1
Cow's Horn has a Survivor plant personality Survivor 1
Cow's Horn has a Blooms easily plant personality Blooms easily 1
Rjg avatar
leaf-1 124 Plants
xp 104,248 XP
globe Austin, TX

Love this big guy!

Fast grower Fast grower
Survivor Survivor
Blooms easily Blooms easily

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