Hello, I live in the Seattle area and I have a strange area that needs to be replanted. It's in a corner of my house between the garage and the rest of the house, and only gets a few hours of afternoon sun. The corner has walls to the south and east. I'd like to grow mostly evergreens so it looks nice all year and want to try experimenting with vines to mask a heat pump exchanger. Plants that are currently thriving there are hydrangeas, a rhododendron and azaleas.

I'd like to do evergreen clematis to grow up and soften the hard lines of the house, and daisy gardenias or something similar that doesn't grow more than 3 feet tall to go around the sides of the house, then I'd fill in the area with ferns and hostas. Does this seem reasonable? Is it likely that these plants will die?