Plant Care Brain Cactus

Brain Cactus

Also known as

Mammillaria elongata cristata, Mammillaria elongata Cistata and Mammillaria Elongata crested


Mammillaria elongata f. cristata

How to care for Brain Cactus


How often to water your Brain Cactus

Water needs for Brain Cactus
0.5 cups
every 12

Brain Cactus 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 Brain Cactus

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 Brain Cactus in your home

Light needs and placement for plant Brain Cactus: 1ft from a window
1ft or less from
a window

Brain Cactus love being close to bright, sunny windows 😎.

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

Brain Cactus does not tolerate low-light 🚫.

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


How to fertilize Brain Cactus

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

Water Needs
Sunlight Needs
Native Region

Care Summary for Brain Cactus

Brain Cactus

Brain Cactus

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.

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