While not ideal, planting vegetables on a slope may be the only option for some home gardeners. Probably the biggest disadvantage to gardening on a slope is the amount of soil erosion experienced during heavy rains. Fortunately, with careful planning you can minimize the amount of soil erosion and successfully grow vegetables in less than ideal garden conditions.
Till the garden area horizontally with a rake or rototiller. Dig the tines into the soil, working to a depth of 8 inches. Add an inch of compost to the top of the soil. Re-till the area to mix in the compost.
Place wood planks, large stones or bricks around 4 foot by 4 foot sections, setting each raised bed below the next, building down the slope to create terraced raised beds. Make enough raised beds to cover the entire tiered garden area.
Plant vegetable plants and seeds in rows running across the slope. Place moisture-loving plants near the bottom of the slope as water naturally collects at the bottom. Follow the spacing requirements as printed on seed packets and plant labels.
Water the soil daily until moist. Skip watering on days when the soil looks moist. As the bottom of the slope retains moisture, refrain from watering that particular area if it appears moist, but water the rest of the garden if needed.