I cut them back so hard that they actually looked just like a clump of sticks for some time! Poor lopsided looking diosma on left with pruned diosma on right. I did this in autumn and was pleasantly surprised that by spring they were sprouting lots of new growth and they have just continued to thrive since then.

How do you prune diosma?

Lightly trim after flowering (October) and periodically through the spring and summer to encourage a dense, compact plant.

Why is my golden Diosma dying?

It takes months to get a water-repelling soil working again, so keep watering. … The take-away point here is: plants can die due to lack of water in gardens that are watered often.