Wood Retaining What Are Some Plants To Use For Retaining Soil On A Slope? Area Is The Southwestcoast Of Canada.?

What are some plants to use for retaining soil on a slope? Area is the southwestcoast of Canada.? - wood retaining

On my back yard slopes down toward a wall of rotten wood, then suddenly fall into a ravine. We have reason to the foot of the hill with all the rain we lost here. I wonder what plants shrubs, trees or even effective in the conservation of the soil. There is only one Bush in the court right now, seems to be what kind of Holly. It seems to keep on the ground around him. The backyard is very little sun.

Thank you for your help!