The ‘Fairy Castle’ Cactus: My Kind of Fairy Tale Castle!

Growing cacti hasn’t always been easy for me. For many years, I deliberately avoided them because I couldn’t keep them alive. Since then, however, I’ve discovered my own methods for cultivating them. With that in mind, I want to introduce you to a cute little cactus that looks like a miniature medieval castle!

It’s the “Fairy Castle” cactus. Usually, I would include the Latin name here, but there is a lot of mystery surrounding this famous cactus. While many agree that it is a dwarf form of Acanthocereus tetragonus, others find it very similar to Cereus repandus. To find the answer, one would have to observe its flowers.

A Rare Bloom

However, this cactus rarely, if ever, flowers. Few gardeners have seen it bloom, and even fewer have observed it closely because it appears in the dead of night. Thus, it remains a mystery!

This cactus is mainly cultivated for its beautiful appearance and unique stems.

Fall Under Its Spell

It must be said that the plant is absolutely adorable and lives up to its name. Plants that evoke “things” generally make us dream. Consider the dolphin plant (Senecio peregrinus), the string of turtles (Peperomia prostrata), and the string of pearls (Senecio rowleyanus), for example. These small, castle-shaped cacti are no exception!

This plant is described as a cluster of upright stems with three to five ribs. Each stem produces numerous secondary stems, creating a turret-like effect. Additionally, perfectly aligned white areoles mark each side of the stems, resembling decorative stones. As an added bonus, the spines are either very short or quite sparse. When purchased, they measure just 4 to 6 inches (10 to 15 cm) in height.

Still in Miniature Form

After several years of cultivation, the plant can grow to a height of between 30 cm and 45 cm (12 to 18 inches). As it grows, the castle expands. Some secondary stems fall off, take root, and produce new turrets. Some claim that the plant can exceed two meters in height, though I have never seen such large specimens.

Easy Care

It gets a perfect score in the “cute as hell” category, but how easy is it to cultivate? Is this a cactus I could add to my list of the ones I’m capable of growing? The answer is yes!

The “Fairy Castle” cactus thrives in a bright spot, as any good cactus should. In the summer, it can be placed outdoors, where it will flourish. In the fall, when temperatures hover around freezing, bring it indoors and place it near a window that receives plenty of light but not direct sunlight. I also tend to grow cacti in a cooler room of the house in winter, and this one is no exception.

When it comes to watering, make sure the soil is completely dry before watering again. As with all cacti, the best way to kill it is to overwater it! It should be obvious, but this cactus must be grown in a container with drainage holes. As for fertilization, it’s minimal and is only applied in the summer when the plant is actively growing. You can use a specialized cactus fertilizer or apply half the recommended dose of an all-purpose fertilizer (i.e., add twice as much water).

This cactus prefers to grow compactly in its pot. This means you can postpone repotting it into a slightly larger container for as long as possible. If repotting is necessary, use a potting mix formulated specifically for cacti that contains plenty of horticultural sand to ensure excellent drainage. Mixes based on pumice and coconut fiber are also excellent for this cactus.

With minimal effort, the “Fairy Castle” cactus can live and even grow for several years. Its unusual shape is a great marketing tool, but the plant itself exceeds expectations and will always be recommended for beginner gardeners.