Oakland Sloped Garden
I had the pleasure of working on a job in Oakland where my client’s goal was to salvage as much of the existing landscape as possible. At the same time they really wanted an area for raised beds, a small play area for their little one, and more useable spaces in their sloped garden. It was challenging because the existing landscape had layers of different materials built up over the years with a slick and rickety creosote railroad tie staircase. Each retaining wall was made from pieces of stacked broken concrete, stone, and wood, creating levels that were not useable. One thing was for certain, the railroad tie staircase had to go.
Rebuilding the staircase allowed us to reroute it to maximize existing spaces and to safely access the sloped garden. The old staircase was unnecessarily wide in some parts, eating into valuable useable flat space. The new staircase starts out wide and welcoming near the house, but then narrows into a utilitarian staircase as it winds up the slope to the various garden ‘rooms’.
The first room houses the raised vegetable garden. We kept the existing drystack stone retaining wall because it was in good condition but built out another retaining wall on the downslope to create a flat area for the raised beds. This was the sunniest area in this Oakland garden which was mostly covered in shade from huge Coast Live Oaks and eucalyptus. We used metal ‘L’ brackets called M Brace from Art of the Garden for the raised beds. 2×8 pieces of redwood slip into the metal brackets. The raised beds can be configured into different sizes depending on the space, simply by trimming the wood to the desired length. The frame is then filled with soil and ready to be planted. There’s lots of wildlife in this Oakland backyard so we installed a wire mesh of gopher barrier at the bottom of each of the raised beds before filling with soil. This will prevent any underground gophers and moles from coming up through the bottom of the raised beds and harvesting the veggies for themselves.
The second room was the one-person reading perch. It is nestled under the dappled shade of the Coast Live Oaks and made of two small drystack stone retaining walls. We kept the patio small so as not to disturb the sensitive root systems of the oaks. We were also able to keep all the existing soil on site by not overcutting into slopes and using all the soil fill to create level ‘rooms’.
Walking further up the stairs, the third level room is dedicated to play. There is a small patch of shade loving lawn next to a play area. This level was already established in the existing landscape by the blue rock retaining wall. We were able to enlarge the level area by consolidating two failing shorter stacked concrete retaining walls into one three foot high retaining wall. Above this wall we dedicated to edible plants. We planted a blueberry patch with a mix of different varieties to provide a longer season of harvest with edible thyme to trail over the wall.
Finally, at the very top of the sloped garden, you reach the fire pit. This room existed in a dilapidated unusable state before because the huge eucalyptus tree roots had busted open the stone retaining wall. The stone was mortared together, leaving a huge crack right in the middle of the retaining wall. The existing patio underfoot was uneven and hard to access by a small offshoot of a staircase, only 18 inches wide. We reused the existing stacked concrete debris and created a new drystack concrete retaining wall further away from the eucalyptus root. The drystack nature of the retaining wall will move and shift as the roots grow, hopefully, not for a long time since we gave it more room to expand. The floor of the fire pit patio is decomposed granite which will also be forgiving and easy to repair if the roots decide to make an appearance.
All throughout this Oakland landscape we inserted fruit trees and edible plants. Rosemary and sage are used in planting beds amongst ornamental perennials. Fragrant lemon verbena and lavender attract hummingbirds. A strawberry patch grows just above the raised vegetable garden area. Kiwi vines grow on the fences. Persimmon, fig, pear, apple, plum, lemon and kumquat trees dot the sloped garden and fight to win the battle against the dense layer of eucalyptus leaves that can easily smother plants.
Limited sunlight, eucalyptus droppings and a mishmash of materials were all challenges in this Oakland backyard. Thanks to my clients, who were open to trying new things and appreciative of the whimsy and beauty of reusing materials, we were able to create a functional, beautiful and purposeful landscape. The overwhelming slope is safely accessible and provides a daily journey through shadow and light. This sloped garden, full of wildlife continues to evolve as the plants and trees grow and the raised vegetable garden gets changed through the seasons.