Rocky slopes challenge even experienced gardeners. Consider this potential roadblock an opportunity. Changes in terrain make natural focal points. Rocks on a slope can be used as terraces, plant nooks or cascade walls. Large anchor rocks can be placed at the base of the hill to tie in the slope with the rest of the garden. Many high-end garden landscape professionals actually build up flat land gardens in order to create variety and interest. Embrace the slope and enhance your garden and home.
Walk up your slope. Pull out any existing weeds from the root and dispose of them carefully, since any seeds discarded on the ground can sprout. Rake smooth the soil, removing or saving smaller rocks. Cut back any tree branches that might limit sun or air circulation
Make a rough sketch of the layout of your garden. Use a compass and write down the north-south-east-west exposure on your garden sketch. If your slope is north-facing, you'll choose different plants than if your slope has the full sun of a south-facing slope.
Note any existing drainage issues, including any pipes that may direct water onto the top of your hillside. Reroute these water sources. Eliminate any sources of erosion on your slope.
Sketch out the location of any very large rocks. Draw them as squares on your sketch to help you remember their location. Plan out where you want to plant each plant on the sketch. Use a different color pencil for each different plant type.
Mark plant locations indicated on your sketch, using plastic landscape flags. Push the metal wire support at least 3 inches into the soil. Dig out small terraces with a large spade. The terraces should be twice as wide as each plant. Repeat for each plant location.
Gently dig out holes to accommodate your plants in the middle of each terrace. Place the plants in the holes, add amendments to the soil if needed, and back-fill the holes with the displaced earth. Tamp the plants down with your fingers and palms.