Plant Care thumb cactus

thumb cactus


mammilaria matudae

How to care for thumb cactus


How often to water your thumb cactus

Water needs for thumb cactus
0.5 cups
every 12

thumb 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 thumb 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 thumb cactus in your home

Light needs and placement for plant thumb cactus: 3ft from a window
3ft or less from
a window

thumb cactus 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 thumb cactus in your home 🏡.


How to fertilize thumb cactus

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

Care Summary for thumb cactus

thumb cactus

thumb cactus

Greg recommends:


0.5 cups every 12 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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