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Acanthocereus tetragonus 'Fairy Castle' (Fairy Castle Cactus)


Scientific Name

Acanthocereus tetragonus 'Fairy Castle'

Common Names

Fairy Castle Cactus


Acanthocereus tetragonus 'Fairy Castles', Acanthocereus tetragonus 'Fairytale Castle', Acanthocereus floridanus f. monstruosa, Cereus 'Fairy Castle', Cereus 'Green Fingers', Cereus hildmannianus f. monstruosus 'Fairy Castles', Cereus tetragonus 'Fairy Castles'

Scientific Classification

Family: Cactaceae
Subfamily: Cactoideae
Tribe: Echinocereeae
Genus: Acanthocereus


Acanthocereus tetragonus 'Fairy Castle' is a dwarf, slow-growing cactus with many mid-green branches and branchlets that resemble a castle's turrets. Each branch has five sides and short white spines that grow along the ribs. An adult plant can reach about 3.3 feet (1 m) in height. Nocturnal flowers are white or yellow and rarely produced.

Acanthocereus tetragonus 'Fairy Castle' (Fairy Castle Cactus)

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USDA hardiness zones 10a to 11b: from 25 °F (−3.9 °C) to 50 °F (+10 °C).

How to Grow and Care

Fairy Castle Cactus is easy to care for. It is one of the most commonly sold indoor cacti because of its popularity among beginners. You can find them at any garden center, online, or even your local grocery store. They are often sold with bright straw pink or yellow flowers hot-glued to their spires to add color. Many growers prefer to gently remove the fake flowers or allow them to fall off as the cactus grows.

This cactus is a full sun plant that requires well-drained soil. Plant Fairy Castle Cactus in an unglazed clay pot that allows excess moisture to evaporate. It will grow best in good cactus potting soil, or you can make your own.

Place Fairy Castle Cactus in a bright sunny location that is away from drafts or air conditioning. When you water, water until the liquid comes out of the drainage holes and then allow the soil to dry out before watering. Overwatering is the easiest way to damage a cactus. Fairy Castle Cactus care is easiest in winter when you can cut in half the amount of water the plant receives.

Fertilize with a good cactus fertilizer in spring when growth resumes. Feed monthly or with irrigation in a dilution that is half strength. Suspend the feeding in winter.

Learn more at How to Grow and Care for a Fairy Castle Cactus.


Acanthocereus tetragonus 'Fairy Castle' is a miniature cultivar of Acanthocereus tetragonus.



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