What is a great " porch plant/ flower" for fall and winter in South?

Not sure what zone you live in, but Bougainvillia is a beautiful plant that comes in many varieties, colors and sizes. I also love honeysuckle, ivy geraniums and spiderplants. Happy gardening!

Depending on how cold it gets in winter, wisteria is a gorgeous porch plant: beautiful, dramatic, fragrant....https://www.gardeningknowhow.com/ornamental/vines/wisteria/growing-wisteria-proper-wisteria-vine-care.htm

Pansy, marigold, cyclamen, mumm, my jasmine grows like crazy in winter if in the sun. Succulents do well too.

Here are a couple links to help you out.

http://planthardiness.ars.usda.gov/PHZMWeb/#

http://www.learn2grow.com/gardeningguides/seasonalgardening/winter/WinterGardeningSoCalStyle.aspx

Begonias.... 2500 species... https://www.gardeningknowhow.com/ornamental/flowers/begonia/annual-begonia-care.htm

http://begonias.org/idb.htm

http://www.bradsbegoniaworld.com

I agree, Bougainvillia are great!

how cold does it get where you are located? What size restrictions do you have and what colors do you prefer??