Is it best to cut back Osteospermum at this time of year or will it get damaged by frost?
Pruning Osteospermum (African Daisy)
Certified GKH Gardening Expert
Actually, pruning it cack won't really make any difference. It is an annual and will not survive winter outdoors unless it's grown in a very warm climate. Here is more information: https://www.gardeningknowhow.com/ornamental/flowers/african-daisy/african-daisies-osteospermum.htm