not easy to cultivate. Need a very well drained soil. Requires strong
sun to part sun to develop good spinal growth and waterings should be
rather infrequent to keep the plant compact and not to become
excessively elongated and unnatural in appearance. Keep dry in
winter or when night temperatures remain below 10° C, it is hardy to
-4°C for a short period. Assure a good ventilation.
Photo of conspecific taxa, varieties, forms and cultivars of