Planting Guide · March 2025 · 5 min read
Companion planting pairs crops that benefit each other through pest deterrence, pollination support, or improved nutrient availability. Understanding which plants work together—and which clash—can boost yields without extra inputs.
The "Three Sisters" of corn, beans, and squash remains one of the most effective companion groupings, with beans fixing nitrogen, corn providing a trellis, and squash shading out weeds. Tomatoes and basil grow well together, as basil may repel aphids and whiteflies. Carrots and onions planted in alternating rows help deter each other's primary pests.
Fennel produces compounds that inhibit the growth of most vegetables and should be planted in isolation. Beans and alliums such as onions and garlic are poor neighbors because alliums can stunt bean growth. Brassicas and strawberries also compete poorly when planted together.
Border plantings of sweet alyssum, dill, and yarrow attract parasitic wasps and hoverflies that prey on aphids and caterpillars. Allowing a few carrots or cilantro plants to bolt and flower provides nectar for beneficial insects throughout the season. These habitat strips pay dividends in natural pest control.
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