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Disocactus x mallisonii (Rat’s Tail Cactus)


Scientific Name

Disocactus x mallisonii (Otto & A.Dietr.) Barthlott

Common Names

Rat’s Tail Cactus


Aporocactus x mallisonii, x Aporoheliocereus mallisonii, x Aporoheliocereus smithii, Cereus x mallisonii, Cereus mallisonii, Cereus x smithii, x Heliaporus smithii

Scientific Classification

Family: Cactaceae
Subfamily: Cactoideae
Tribe: Hylocereeae
Genus: Disocactus


Disocactus x mallisonii is a tender, pendent, perennial cactus with stout, bright green, ribbed stems up to 0.4 inch (1 cm) in diameter, bearing brown spines. The flowers are narrowly tubular, funnel-shaped and bright pink or red.


USDA hardiness zone 10a to 11b: from 30 °F (−1.1 °C) to 50 °F (+10 °C).

How to Grow and Care

Disocactus should be grown in a rich but still well draining soil. They should be watered regularly and fertilized as well. This is essential for good growth and flowering. During the growing period the plants need frequent watering; from October to March and waterings should be rather abundant, so that the soil becomes completely soaked, but let dry between watering. Keep relatively dry in winter or when night temperatures remain below 10° C. Disocactus dislike extreme heat and cold, so they are best green-housed during the depth of winter and heat of summer in hot dry climates. They also prefer shade to sun, and like a little extra humidity in the air. Flowering in spring and summer the flower color varies from white, yellow red or purple depending on species.

Disocactus can be reproduced both by seeds and cuttings… – See more at: How to Grow and Care for Disocactus


It is a hybrid between Disocactus flagelliformis and Disocactus speciosus.


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