Posted: 18/04/2014 at 22:48
I don't think that osteospermum is usually hardy, Steve. This last winter has been so mild a lot of tender plants have survived, whereas normally they would have succumbed to frost. I have a row of argyranthemum that I expected to die but is about to flower. Normally you would take cuttings in Autumn to overwinter for the following years plants.