This document provides a companion planting chart that shows which plant species make good companions for other plants and which ones should not be planted together. The chart uses symbols to indicate whether each plant listed is beneficial, harmful, or neutral to the other plants. It covers a wide variety of common garden plants and some information about using certain plants to repel common garden pests or attract beneficial insects. The chart is designed to help gardeners maximize the potential of interplanting by reducing pests and optimizing soil and sunlight usage.