H. cooperi var. dielsiana is species from cooperi group with virtually no leaf awn and very rounded leaf end, keel and margin, some locality forms have margin spines. It is slowly proliferating species
cultivation can be grown without any problems, they can grow quite large in greenhouse. They stay usually solitary, so the propagation should be done by seeds.
Try not to water the leaves, give water to soil only. Avoid overwatering as the roots may get rot. Water the plant in a morning, between 8 to 10 am. Avoid keeping in suffocated areas or in dark room. While, re-potting or propagating try not to disturb the roots. Required care in the winter season. If growing in a pot, then kept in indoors and growing in outside do mulching.