Easy to propagate. Just clip off a stem and push it into the soil. For faster results, a patch can be lifted, divided and replanted;
Adaptable to harsh growing conditions, which means shallow and poor soil, exposed sites and winter cold;
Tolerant to full sun as well as morning sun and afternoon shade;
Partial to very well-draining soil;
Non-tolerant to overwatering (rather err on the dry side) and over fertilising (just add a few slow-release fertiliser granules when planting them and let go!).