I have had impatiens in full shade (north side of house) and they did okay, not great, but okay. Begonias can handle full shade too I think.

Double Impatiens and Diamond Frost Euphorbia are a pretty combination - I've also paired pink Impatiens with the purple/pink variegated coleus. It really brightens a shady spot. Heuchera will also do well in the shade.

I think the flower called torenia takes shade. it amazes me becoz it looks like a showy annual.

I don't know which zone you're in, so I'm not sure whether this will work for you, but in my zone 10 dry Mediterranean climate hydrangeas take full shade. They actually do better in shade, as they fizzle in our hot Summer sun. They require regular watering though.

Eduarda

I'm a fan of begonias. I had rieger/reiger (sp?) begonias on my porch last year and they were exquisite. They bloomed their heads off, and I even overwintered them indoors. Not sure if you meant you were looking to put something ON your porch or near your porch, but these like cover and to be watered at soil level. So, they do well on a porch.

Lisa

I forgot about Begonias. That would be my best bet since it's Wally World. lol

Last night I was excited about putting a new plant on the porch, this morning I don't want to plant, I'm too tired!

What about mixing some painted fern in with impatiens? I think that would be a nice combo. Buy the larger size impatiens if it's full shade so you don't have to depend on them growing.