Most hardy osteospermum variety and pruning

Osteospermum jucundum is the only reliably hardy one, whatever the Nurseries promise! I have tried other so-called hardy named ones and they didn't survive.

I don't exactly prune mine, they do creep in the border, layering themselves, and I sometimes cut off or pull out a dead piece, as you say, woody.

I am replacing a few this year as they have got too woody and are well past it!