I have a shady backyard with a black walnut tree, and I'm looking to add some height and variety to the plants that are there. Currently, there are a couple of varieties of hostas, a fern, astilbe, wild ginger, sedum along the fence. I'm pondering if a couple of blue point junipers or arborvitae could survive back here along the fence-- I'm worried about the shady environment, possibility for winter burn, and proximity to the walnut. Would love to have some feedback. A photo is attached of the backyard as it is, and the second is an AI generated photo with suggestions (I don't trust AI like I trust you guys!). I'm also thinking about adding a larger planting ring around the tree itself. What plants other than hostas could handle it? And, any ground cover alternatives that might work back here (as you can see, the grass is not going well).