This document provides information on companion planting, including:
1) It defines companion planting as growing plants together to assist each other through pest deterrence, improved growth, flavor enhancement, and other benefits.
2) While some combinations are effective, companion planting results can be mixed and it is not well understood scientifically.
3) The most effective approach is to increase biodiversity in the garden, such as with native trees and shrubs, to encourage beneficial insects and deter pests.
4) An extensive chart is provided listing specific plant companions and how they might help or harm each other.