Our driveway cuts through the side of a hill. The 'uphill' side in parts is at a perhaps 65 degree angle so steep, and there's a bit of erosion... enough to expose some tree roots.
Ideally we'd use some physical retaining wall solution (stone walls or gabion/reno mattresses) but given that we're broke at the moment, I thought I could at least maybe plant something to hold the soil together until we can afford bigger/better options.
The catch is that it's entirely shaded.
We're in the Pacific Northwest coastal climates.
Is there any sort of spreading non-invasive ground control that we could get to take hole on the hill? Or should we just figure that mechanical retaining walls are the solution?