Crop rotation is one of the oldest and most effective strategies to control potential gardening problems. It is as simple as planning to plant a selected crop in the east end of the garden and then the next season, plant it on the west side of the garden.  Plants that follow should be from a different family than the previous one.  It is ideal for most crops to wait 3 years before planting in the original area.  Moving crops to different areas of the garden each year provides many advantages such as maintaining soil fertility, reducing soil erosion, prevents diseases and pests, helps to control weeds and reduces reliance of synthetic chemicals.