Also known as
Mystax and Mamillaria mystax
How to care for Cactus Mystax
How often to water your Cactus Mystax
Cactus Mystax needs 0.5 cups of water every 12 when it doesn’t get direct sunlight and is potted in a 5" pot located in Houston, Texas.
Use our water calculator to personalize watering recommendations to your environment or download Greg for more advanced recommendations for all of your plants.
Water 0.5 cups every
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.
Finding light for Cactus Mystax in your home
Cactus Mystax love being close to bright, sunny windows 😎.
Place it less than 1ft from a south-facing window to maximize the potential for growth.
Cactus Mystax does not tolerate low light 🚫.
Houston, Texas currently has medium levels of sunlight intensity, you can help this plant grow by treating it to ample light ☀️.
How to fertilize Cactus Mystax
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 Cactus Mystax after it doubles in size or once a year—whichever comes first.
Cactus Mystax thrives in dry soil and should be watered sparingly. Use our water calculator to personalize watering recommendations to your environment or download Greg for more advanced recommendations for all of your plants.
Cactus Mystax requires abundant, bright and direct light. Place it less than one foot from a window to ensure it receives enough light to survive 💪. Select your region to see how the current weather in your area affects the placement in your home 🏡.
Greg does not have confirmed data on this plant’s toxicity. If you, a family member, or a pet consumes plant material of unknown toxicity, it’s always best to consult a medical professional.
If you or someone else ingested this plant, call Poison Control at US (800) 222-1222. If a pet consumed this plant, contact your veterinarian or the ASPCA at US (888) 426-4435.
Cactus Mystax prefers dry environments. Providing extra humidity or misting your plant allows water to linger on leaves, which can create the perfect environment for harmful types of fungi.
Cactus Mystax is very sensitive to wet soil, so choose a potting soil that drains very well and doesn’t retain too much moisture. A good soil will have lots of perlite or vermiculite for drainage and some organic matter for nutrition. A few handfuls of perlite added to regular store-bought cactus soil will do the trick!
Cactus Mystax grows very slowly and doesn’t require added fertilizer. Replacing your plant’s potting soil once a year should provide them with more than enough nutrition. Remember, plants get their energy from sunlight, not fertilizer!
It’s common for Cactus Mystax to go dormant in the wintertime and you may notice their growth slow down. Waterings should be spaced out more during this time.
Cactus Mystax is native to the Southwestern United States, Central America, and the Caribbean.
Cactus Mystax produces flowers in the wild, but does not flower when kept as houseplants.
Care Summary for Cactus Mystax
0.5 cups every 12 days
< 1ft from a window
Repot after 2x growth
Based on your location in Houston, Texas, the 4” pot your plant is in, and that it doesn’t get direct sunlight.