Imagine such a robust Euphorbia pentagona or donkienoors (donkey spurge) plant exuberantly blooming in full sun among rocks in your garden one day! But then imagination so easily jumps to the Aloe behind, and before long you have to move house for a bigger garden somewhere.
Winter and summer temperatures, winter and summer rainfall (and how much), all have to be considered as you add and delete plants from your list while feeding fantasy. Or stay right where you are and visit Kirstenbosch and the other botanical gardens more often. There are too many to choose from that could never fit into the same type of garden anyway. One trusted rose bush or a few daisies in season can do it for the receptive mind.