Cereus Peruvianus, Computer Cactus. C13

17007

The genus Cereus belongs to the family Cactaceae and is composed of about 50 species of cacti from the south of the American continent. It is commonly known as the Computer Cactus.

Specific References

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They are fast-growing columnar and branched cacti that can grow up to 10 metres high. The stem has 5 to 9 well-marked ribs, is bluish-green when young (later turning light green) and has areoles with brown spines. The very showy flowers measure up to 16 cm in diameter, are white in colour and open at night and in the early hours of the day.

It is a plant that flowers during the summer once the plant is more than 4 years old. Finally, they produce fruit from which seeds can be obtained.

It is most commonly used in pots on terraces and patios, as houseplants, in cactus and succulent gardens and to form informal hedges or barriers. It is believed to absorb electromagnetic radiation by being placed next to computer screens.

Cereus peruvianus likes full sun although it can live in semi-shade or indoors near a window. It should not be exposed to temperatures below 7°C, although it can withstand a light frost if the soil is very dry. A winter rest at 10-12°C is recommended.

It likes well-drained soils (they have a tendency to root rot) for which we can prepare a mixture, in equal parts, of topsoil, coarse sand and blond peat. They prefer the soil to be somewhat calcareous. The pot should be repotted at the beginning of spring.

It should be watered moderately in spring and in summer, waiting until the soil has dried out. From autumn onwards, start to reduce watering until winter, when watering should be reduced to once a month.

Ideally, fertilise with a fertiliser for cacti and succulents once a month in spring and summer and with a little organic matter in early spring.

Computer cacti do not require pruning but can be cut back in early spring to control their growth.

The main enemies of this plant are excess moisture, flat scale and root mealy bugs.

This plant is easily propagated from seeds sown in spring in a seedbed with a sandy substrate rich in organic matter. It can also be propagated by cuttings taken in spring or summer.

17007

The genus Cereus belongs to the family Cactaceae and is composed of about 50 species of cacti from the south of the American continent. It is commonly known as the Computer Cactus.

Specific References

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