Fairy Castle Cactus

Acanthocereus tetragonus

Fairy Castle is a beautiful miniature cactus that grows a lot of green branches. These branches have 5 sides, with small white spines on each side ribs. It is called the fairy castle for the reason that its branches clump together as it grows. It is easy to care for and is one of the most popular cactus among beginners. It is well suited for indoor plants.

Fairy Castle is a dwarf, columnar cactus that grows very slowly. Sometimes, when mature, it produces Nocturnal white or yellow flowers as well. But it takes a long time to become mature.


Details about Acanthocereus tetragonus "Fairy Castle Cactus"

How to care for Acanthocereus tetragonus “Fairy Castle Cactus”

Acanthocereus tetragonus “Fairy Castle Cactus” is a very popular plant, especially among beginners. It needs very little care and can be easily grown indoors. One thing that you should keep in mind, is that this cactus has a lot of spines. So take care when handling. Even its name means the same, i.e. Acanthto in Greek called akantha, meaning “thorn”.

Where should you plant Fairy Castle Cactus?

If you live in a colder environment, You should plant Acanthocereus tetragonus “Fairy Castle Cactus” in a container (use DIY succulent soil or get pre-mixed succulents soil). Because it is not cold hardy, so you'll be able to bring it inside in winter. But provide about 2 to 3 hours of direct sunlight, if possible. As it grows well in partial sunlight or partial shade.

How to water Fairy Castle Cactus?

Acanthocereus tetragonus "Fairy Castle Cactus" does not require any special watering schedule. You can use the same watering method as other succulent plants. The rule of thumb is, it is best to water when the soil is completely dry. Otherwise, its roots may rot in wet soil.

How to Propagate Acanthocereus tetragonus “Fairy Castle Cactus”

Acanthocereus tetragonus “Fairy Castle Cactus” can be propagated with cutting or seeds. The stem cutting is preferable as it's better and easier to care for.

Propagate by Cuttings

To propagate Acanthocereus tetragonus “Fairy Castle Cactus” by stem cuttings, cut a stem from the main plant. Allow the removed stem to callous over for some days. Then place the stem in well-draining soil.

Remember to give water when the soil is completely dry. I have mentioned that at the last in watering succulents guide.

Propagate by Seeds

Although you can propagate Acanthocereus tetragonus “Fairy Castle Cactus” by seeds. But this is not the recommended method. Because it is a very slow grower.

To grow by seeds, place the seeds in well-draining succulent soil. Water them when the soil dries out. If you are living in a cooler area, you can place the seeds outdoor, otherwise, do it indoors with grow lights.

Where to Buy?

Pairs Well With

Faucaria tigrina “Tiger’s Jaw”

Video of the Fairy Castle Cactus

There is a good video to watch produced by Graceful Plants (Youtube Channel).

Re-poting fairy castle cactus succulent

Facts & Features

  • 6 ft Tall

    This plant grows up to 6′ (1.8 m) tall.

  • Grows in Spring and Fall

    Need more care during these times.

  • Indoors Lit Area

    Better to keep it near a window where it gets enough sunlight. OR, keep it outdoors.

  • Non Toxic

    It's safe for humans and pets.

  • Normal Watering

    Use regular succulent watering methods. Learn how to water succulents easily.

  • Not Cold Hardy

    Protect from very low temperatures.

  • Partially Shady Sunlight

    You can keep it in full sun but protect it during the afternoon.

  • Propagation by offsets and seeds

  • Zone 10a

    In this zone, the temperature can drop up to 30° F ( -1.1° C )

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