South Carolina has three separate horticultural zones which complicate fall planting for vegetables and flowering plants.
It is recommended and suggested that fall vegetable plants grown for their leaves or roots can be grown in partial shade due to limited amounts of direct sunshine.
The following website includes Table 1. Planting Chart Dates to Plant in South Carolina for the 3 planting zones (Piedmont, Central, and Coastal) in South Carolina ,
and includes a map sorted according to counties:
Clemson Cooperative Extension (Vegetable)
www.clemson.edu/extension/hgic/plants/vegetables/gardening/hgic1256.html
Clmeson Cooperative Extension (flowers and landscaping)
Includes recommendations of annuals for shade and partial shade, as well as hardy and half-hardy annuals, and other difficult growing conditions.
www.clemson.edu/extension/hgic/plants/landscape/flowers/
According to the extension planting schedule, you are on the cusp of fall planting.
The hardy and half-hardy flower varieties might over-winter well if given enough mulch protection.
Thank you for this useful info, I wasn’t aware that I live in the Coastal zone!..