Companion Planting & Botanical Pesticides: Concepts & Resources

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By George Kuepper & Mardi Dodson, updated by Justin Duncan, NCAT Agriculture Specialist

Published: 2001

Updated: April 2016



20 pages


Certain plants can benefit others when planted in close proximity or used as botanical pesticides. This publication discusses the scientific and traditional basis for companion planting associations including trap cropping, weed suppression, physical-spatial interactions, and other relationships. It provides a companion planting chart for common herbs, vegetables, and flowers, as well as a listing of literature resources. An appendix provides information on the Three Sisters, a traditional Native American companion planting practice.

Table of Contents

Traditional Companion Planting
Companion Planting Chart
The Scientific Foundations for
Companion Planting
Botanical Pesticides
Options for System Design
Further Resources
Appendix: Ancient Companions

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This page was last updated on: May 7, 2019