Companion Plants for Tomato
Tomato thrives alongside Basil, Carrot, Parsley, and more. Here's the complete guide to what to plant nearby — and what to keep at a distance.
✅ Best Companions for Tomato
These plants improve each other's growth, deter pests, or attract pollinators when planted nearby.
Aromatic oils confuse and repel common insect pests, reducing aphid and whitefly pressure on nearby plants.
View Basil's companions →Uses underground space while Tomato occupies the canopy above — minimal resource competition, maximum bed productivity.
View Carrot's companions →Aromatic oils confuse and repel common insect pests, reducing aphid and whitefly pressure on nearby plants.
View Parsley's companions →Repels a broad range of pests and attracts predatory insects (lacewings, hoverflies) that feed on garden pests.
View Marigold's companions →Attracts bees, butterflies, and other pollinators, increasing fruit set for neighboring plants.
View Borage's companions →⚠️ What Not to Plant Near Tomato
These combinations can stunt growth, attract pests, or compete heavily for the same nutrients.
Heavy feeders that compete aggressively for nitrogen and can harbor shared diseases like clubroot.
Fennel is allelopathic — its roots release chemicals that inhibit germination and growth in most vegetables.
View Fennel's companions →Tall stalks shade out lower plants and both crops attract similar pests (aphids, earworms).
Heavy feeders that compete aggressively for nitrogen and can harbor shared diseases like clubroot.
View Kohlrabi's companions →🤝 Plants That Benefit from Tomato
These plants list Tomato as a beneficial neighbor — so the relationship goes both ways.
📐 How to Plant Tomato with Companions
Start with spacing
Plant Tomato at its recommended spacing (24" apart) first. Don't crowd it — healthy air circulation reduces disease.
Add herbs at the edges
Aromatic companions like Basil and Parsley work well tucked 6–12" around the perimeter of the Tomato planting.
Watch for height conflicts
Place taller companions (sunflowers, corn) on the north side of the bed so they don't shade Tomato. Low-growing herbs and flowers can go anywhere in the bed.
Keep incompatible plants a bed away
Brassicas and Fennel should be planted in a separate bed — ideally 3+ feet away — to prevent root exudate and pest crossover.
Plan a companion bed for Tomato
Use the interactive planner to drag Tomato and its companions onto a canvas, see spacing footprints, and catch conflicts before you plant.
Frequently Asked Questions
What are the best companion plants for Tomato?
The best companion plants for Tomato are Basil, Carrot, Parsley, Marigold, Borage. These plants either deter pests, attract beneficial insects, or improve growing conditions when planted nearby.
What should you not plant near Tomato?
Avoid planting Tomato near Brassicas, Fennel, Corn, Kohlrabi. These plants can compete for nutrients, inhibit growth, or attract shared pests.
Can you plant Tomato in a raised bed with companions?
Yes — raised beds are ideal for companion planting because you control exact spacing and layout. Use the square-foot method to place Tomato alongside its best companions within the same bed.
What plants benefit from being near Tomato?
Basil, Chives, Cilantro, Lavender all benefit from proximity to Tomato.
How far apart should I plant Tomato and its companions?
Give Tomato its full 24" spacing. Plant compact companions like herbs 6–12" away at the bed edge, and taller companions (sunflowers, corn) where they won't shade the main crop. In raised beds, use the square-foot grid method for precise spacing.
Does companion planting actually work for Tomato?
Research supports several companion planting mechanisms: aromatic herbs like basil can reduce aphid populations near tomatoes; marigolds release thiophene compounds that deter nematodes; and flowers attract parasitic wasps that control caterpillars. Results vary by garden, but most gardeners see measurable pest reduction within one season.
Want the full Tomato growing guide?
Spacing, planting dates by ZIP code, seed saving tips, and more.