Plant Care Cancer Weed

Cancer Weed

About Cancer Weed

Cancer Weed is a relatively rare houseplant 🌿 that is easy to grow and needs very little water to thrive. They do best in long-lasting, direct light ☀️ and should be less than 1 foot from a window.

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

Cancer Weed belongs to the Euphorbia genus, and is native to Europe to the Western Himalayas, and the Mediterranean to Somalia.

⚠️ Cancer Weed is not safe to consume. If you, a family member, or a pet has ingested any amount of plant material contact Poison Control, US (800) 222-1222, or your veterinarian. If you have children, cats, or dogs in the home, we suggest keeping this plant out of reach.


Euphorbia peplus

Also known as

Milkweed, Petty spurge and Radium weed

How to care for Cancer Weed


How often to water your Cancer Weed

Water needs for Cancer Weed
0.5 cups
every 12

Cancer Weed 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 Cancer Weed

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 Cancer Weed in your home

Light needs and placement for plant Cancer Weed: 1ft from a window
1ft or less from
a window

Cancer Weed love being close to bright, sunny windows 😎.

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

Cancer Weed does not tolerate low-light 🚫.

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


How to fertilize Cancer Weed

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

Difficulty Level

Cancer Weed is generally considered an easy-to-care-for plant and makes a great choice for beginners!

Water Needs
Sunlight Needs
Native Region
Growth Pattern

Care Summary for Cancer Weed

Cancer Weed

Cancer Weed

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.

Trending in your area

Similar to Cancer Weed

Discover rare plants

This plant is popular in