Acanthocereus tetragonus 'Fairy Castle' is a dwarf, columnar, branching, slow growing cactus with spiny, five-sided, mid-green stems producing numerous smaller offsets.The fairy castle cactus name refers to the numerous vertical stems of different heights that resemble spires and turrets. It will reach about 6 feet (1.8 m) tall with great age. Nocturnal, white or yellow flowers are rarely produced.
The fairy castle cactus rarely blooms. Cacti need perfect growing conditions to produce flowers and the plants in the Cereus family bloom at night. Fairy castle cactus flowers are large and white and usually will not occur until the plant is ten years old or more.
Like most cacti they're drought tolerant and need very little care and attention to grow well. Not enough sunlight and over-watering are common mistakes.
Plenty of sunshine will keep this cacti more than happy. In a glass room you may have to provide some shade during a hot summers day to prevent sunburn.
They should be fertilized during their growing season in the summer with a good oragnic fertilizer.
It is an excellent plant for garden rockery settings, desert type landscapes & Terrariums
For watering cacti, the golden rule is to make sure the soil is completely dry before watering! This will stop the roots from rotting. It is advised to always use a pot with a drainage hole so that excess water can get drained out. If kept in a sunny area, you will need to water it once every week. If it is in a semi shaded or filtered light area, you might need to water it once in 2 weeks.
Cacti like soil that is well aerated and fast draining. You can fertilise the cactus in the summer months when it is in its growing season. During the winters it is best to cut back on any fertiliser and let the plant rest.
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