Impatiens Fusion Glow. They are yellow. I needed some yellow for my shady north side of the house. My entry garden has lots of yellow flowers to complement the house colors. However, most of the yellow flowers are for sun. That was fine for the parts that faced east and south but the walkway passes the garage to the entry which is on the north side. I was worried I couldn't find flowers to plant there. I just happened upon the yellow impatiens in Walmart.

Coleus would be your best bet- Many new varietys with red, gold,yellow,orange,and purple leaves....Plenty to choose from. Also,Gerber daisys will stand some shade,and tuberous begonias.......

They've never bothered my vinca or melampodium. Nor profusion zinnias. Check out some lists on the internet, but keep in mind that if the deer are really hungry, they'll eat anything. I have had good luck with the electric deer fence (battery powered stakes).

I'm in zone 6b and in my experience when full sun plants get only 2 hours or so of direct sun they become weak from inside and fall prey to all kind of bugs. Past summer I had some extra petunias which I had to keep in a place that gets only about 2 hours of sun in the peak summer (mine is a balcony garden and full sun space is limited). I grew some nasturtiums too which were getting good sun. I read somewhere that the nasturtiums are aphid magnets and so I planted those near my tomatoes and peppers to protect the veggies. Surprisingly the aphids did not touch even a single leaf of the nasturtiums, instead they simply kept on attacking the poor petunias which, despite of being in shade, were flowering beautifully. They became easy target for the spider mites too. The aphids really astonished me with their behavior (with each passing year I'm learning so much in my small garden). So as per my observation, if you apply some kind of bloom booster the petunias will bloom almost profusely though the plants will grow weak with time and will fall victim to pests.