"pammyT" wrote I have osteospermums here and have never done anything to
them. Each
year the clump just gets bigger and bigger and this year I'm simply
going to pull up some stems which rooted and shove them elsewhere in
the garden.
Why would you need to take cuttings if they come back every year?

Because for most of us in the UK they don't.
Even for me most perish, only the purple ones seem to live through a winter.

--
Regards
Bob
In Runnymede, 17 miles West of London