You don't post what zone you're in which would be helpful to folks willing to respond to your question. If you're in a temperate zone, the answer to your question is a qualified yes. I grow both hosta and hydrangea in a couple of part sun garden beds and both do very well. Also growing in the same beds are sedum, cranesbill, stokesia, coral bells, daylily, weigela, dianthus/carnation, columbine, buddleia/butterfly bush, caryopteris/blue mist shrub, chelone/turtlehead, Virginia knotweed 'Painter's Palette,' Polemonium/ Jacob's ladder among others.

Assuming the plants adapt to soil & moisture conditions, there's a good chance the above would also thrive in your garden bed.

Zone is important. Here it can get very hot in that situation. Part Shade is also defined as Part Sun, depends on how you look at it but around here where the sun can be quite intense, its crucial. We have to consider max. heat zones as much as min. cold zones here. Often thats not listed on a tag. Leaves can get torched in that amount of sun on shade loving plants.

Sorry, I thought I did list my zone (zone 5) it rarely gets 100 here in the summer, if it does it's an unusually hot summer. But with that being said it can get as cold as -20 in the winter.

I do have cranesbill geraniums in the same bed as well as columbine (I forgot to mention)

So, I guess adding a few more part sun plants is doable. . .thanks guys. . . (off to add my zone)

So the planting bed is on the north side of the fence? In summer, that area is not going to be in much shade at all - the sun is nearly overhead and the fence won't pose much of an obstacle. You can plant just about anything that doesn't demand full sun.

I had this same situation in my old garden and even though we are up in the higher northern latitudes here in the PNW, my planting bed was still in nearly full sun for most of the day during the growing season. Winter's another story but much less of an issue for herbaceous plants.