Tomato Companion Planting: Who to Plant With and Who to Avoid

Tomatoes are the stars of any garden, but they are quite picky about who grows "over the fence." The right choice of partners can improve fruit flavor, repel pests, and even act as natural fertilizer.

Important: Before studying neighbors, make sure you know the basic care rules. Read our full guide to growing perfect tomatoes.

Best Friends for Tomatoes (Good)

These plants act as a support group, protecting tomatoes from diseases and insects:

• Basil: The ultimate companion. It improves the flavor of the tomatoes and repels flies and mosquitoes.
• Marigolds: A natural shield against root-knot nematodes that love tomato roots.
• Garlic and Onions: Protect bushes from late blight and aphids with their natural phytoncides.
• Carrots: They loosen the soil at depth, providing air to the tomato roots without competing for space above.

Enemies of the Tomato (Bad)

Never plant these near your tomatoes if you want a healthy harvest:

• Potatoes: The worst enemy. They share the same diseases (late blight) and the Colorado potato beetle. They infect each other almost instantly.
• Corn: Shakes the light and attracts the same pests (corn earworm).
• Dill (Mature): Young dill is fine, but once it flowers, it can stunt tomato growth.

AgroPlanner Tip: Our virtual garden bed highlights these links automatically. Just drag a tomato onto the layout, and you'll see who welcomes it and who doesn't!