Companion planting strategically places plants together to enhance growth, repel pests, and improve soil health. Trap cropping uses specific plants to attract pests away from main crops, while plants like dill attract beneficial insects that help control pests. Some plants, like basil, repel aphids when planted near tomatoes, while others, like brassicas, should be spaced apart from potatoes due to differing soil needs.

For example, agastache attracts bees and deters cabbage moths, while alyssum supports pollinators and suppresses weeds. Basil not only repels pests but also improves the flavor of tomatoes. Broad beans fix nitrogen for leafy greens but should be kept away from onions, and borage helps repel tomato hornworms while benefiting strawberries and pollinators.

By choosing compatible companions, gardeners can create a more resilient, productive garden.