If you have a scarcity of level land for growing vegetables, don’t despair. It takes a bit more work to prevent soil erosion and keep the water from running downhill, but you can grow vegetables on a slope.
Run the rows on the contour lines of the hill—rows running up and down the hill are difficult to irrigate. If your area receives a great deal of rainfall, pile a stack of compost at the low end of the rows to absorb fast-flowing water and trap soil particles. Terracing the slope is the ideal solution. When you remove the topsoil to create the terraces, set it aside and return it when the terraces are level.
Provide a slight slope on each terrace along the contour line to prevent standing water. Retaining walls of wood or stone make the beds permanent. On heavy soils, lay lines of fired clay weep tiles or use gravel fill behind the walls to prevent bulging or collapse from water pressure. Sunken, perforated milk cartons or other bottomless containers are particularly good for soaking hillside vegetables without water runningdownhill. Ring of aluminum edging lets water soak moisture loving squash instead of running downhill.
Hillside gardener uses both wood and stone to retain the soil on this terraced slope. Stone wall is covered with strawberries, gives extra depth to deep- rooted tomato plants in wire cylinders. Compost was added to all beds.