"Fairytale castle", Fairy castle" or "Green finger" cactus is the evocative name by which this common succulent plant is marketed and refers to the numerous vertical stems of different heights that resemble spires and turrets. Fairy Castle Cactus grows well on its own roots and will form quite large clumps of several hundreds offsets, if given time and grown properly.

Growing fairy castle cactus inside your home is an easy beginning gardener project. It needs plenty of space for its roots. Use pot with good drainage. Bright, warm window seat in summer enjoy being outdoors, but slowly get used to the sun. Place the little cactus in a bright sunny location that is away from drafts or air conditioning.

Flowers: The fairy castle cactus rarely blooms

Frost tolerance: never let the nighttime temperatures fall below 10°C/they may die with exposure to temperatures below 0°C
Minimum avg. temperature: 50°F (10°C)

Sun exposure: bright light, and some direct sun, but avoid direct afternoon sun in summer

Watering needs: Water thoroughly during the growing season when soil is dry to the touch. Less or no water during cold winter months to prevent root loss.

Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz

Bloom Season	Summer (blooms at night)
Botanical Name	Acanthocereus tetragonus
Common Name	Fairy castle cactus
Dormancy	Winter
Family	Cactaceae
Flower Color	White
Genus	Acanthocereus
Growth Habit	Columnar cactus
Growth Rate	Moderate
Hardiness Zone	10 11 (USDA)
Mature Size	15 20 in. tall
Native Area	Mexico
Plant Type	Perennial cactus
Propagation	By stem cuttings
Resistance	Drought tolerant
Soil PH	6.5
Soil Type	Cactus potting mix soil
Special Features	Dark green stem with 5 angles
Sun Exposure	Full su
Toxicity	Safe for humans
Watering Needs	Low