A happy Dyckia is an easy task to distinguish
even for the untrained eyes.

Here these plants seem to enjoy the company of each other
but soon they will compete for the Sun light and that
will be the time for the wise and attemptive Dyckia gardener to interview.
Unless you look for a clump composed by several Dyckias species.
I myself to no like this situation ´cause the plants will pass an
image of suffering to me.
Dyckias are fond of ventilation and Sun. Air must circulate among their leaves
and the Sun light must touch them.