Tomato Companion Planting Guide

26 beneficial companions • 7 plants to avoid

26
Beneficial
7
Avoid
3
Research-Backed

✅ Beneficial Companions

Asparagus

Allelopathy, Extension/Traditional

Allelopathy, Extension/Traditional

📚 Extension
Borage Borago Officinalis

Pest Deterrence, Scientific (unspecified), Traditional

Pest Deterrence, Scientific (unspecified), Traditional

🌿 Traditional
Legume Family

general, extension

general, extension

🌿 Traditional
Lettuce

Shading, Field Trial

Shading, Field Trial

🔬 Field Trial
Marigold Tagetes Spp

olfactory masking, field_trial

olfactory masking, field_trial

🌿 Traditional
Mint Family Mentha Oregano Thyme Sage

Pest Repellence, Traditional

Pest Repellence, Traditional

🌿 Traditional
Parsley Cilantro Dill Apiaceae Herbs

Attracts beneficial insects, Extension

Attracts beneficial insects, Extension

📚 Extension
Sunflower

Shade, Pest Trapping, field_trial

Shade, Pest Trapping, field_trial

🌿 Traditional
Cilantro

Attract beneficial insects, Traditional

Attract beneficial insects, Traditional

🌿 Traditional
Parsley

Attract beneficial insects, Traditional

Attract beneficial insects, Traditional

🌿 Traditional
Basil

Volatile signaling, Lab Study

Volatile signaling, Lab Study

🧪 Lab Study
Thyme

Improved root development, Field Trial

Improved root development, Field Trial

🔬 Field Trial
Marigolds

Attract pollinators, Traditional

Attract pollinators, Traditional

🌿 Traditional
Onions

Pest deterrence, Extension

Pest deterrence, Extension

📚 Extension
Bush Beans

Maximize garden space, Traditional

Maximize garden space, Traditional

🌿 Traditional
Carrots

General benefit, Extension

General benefit, Extension

📚 Extension
Celery

General benefit, Extension

General benefit, Extension

📚 Extension
Broccoli

General benefit, Extension

General benefit, Extension

📚 Extension
Sunflowers

Trap crop, Extension

Trap crop, Extension

📚 Extension
Nasturtiums

Trap crop, Traditional

Trap crop, Traditional

🌿 Traditional
Calendula

Attract pollinators, Traditional

Attract pollinators, Traditional

🌿 Traditional
Cosmos

Attract pollinators, Traditional

Attract pollinators, Traditional

🌿 Traditional
Zinnias

Attract pollinators, Traditional

Attract pollinators, Traditional

🌿 Traditional
Chives

Pest deterrence, Traditional

Pest deterrence, Traditional

🌿 Traditional
Dill

Attract beneficial insects, Traditional

Attract beneficial insects, Traditional

🌿 Traditional
Unknown

General companion, Traditional, Anecdotal

General companion, Traditional, Anecdotal

🌿 Traditional

❌ Plants to Avoid

Cabbage

Competition, growth inhibition, Traditional/Extension

Competition, growth inhibition, Traditional/Extension

📚 Extension
Corn

competition for nutrients/water/sunlight, extension

competition for nutrients/water/sunlight, extension

🌿 Traditional
Kale Collards Brussels Sprouts Brassica Oleracea Varieties

no advantage, field trial

no advantage, field trial

🌿 Traditional
Cabbage

Stunts growth, Traditional

Stunts growth, Traditional

🌿 Traditional
Corn

Not specified, Traditional

Not specified, Traditional

🌿 Traditional
Potatoes

Not specified, Traditional

Not specified, Traditional

🌿 Traditional
Fennel

Allelopathy, Traditional

Allelopathy, Traditional

🌿 Traditional

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