Tomato Companion Plants
Vegetable80 days to maturity
Tomatoes are the most popular plant in the home vegetable garden, and they respond dramatically to good companion planting. The right neighbors repel the aphids, hornworms, and whiteflies that plague tomatoes, attract pollinators that improve fruit set, and make better use of the space around these tall, hungry plants. The wrong neighbors compete for nutrients, spread shared diseases, or stunt growth outright.
Companion Checker: what grows well with Tomato?
Tap any plant to see whether it pairs well with Tomato and why. Green means a beneficial companion, red means keep them apart.
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Companion Planting Strategy for Tomato
Because tomatoes are heavy feeders prone to pests and fungal disease, the best companions either deter insects (aromatic herbs and flowers), draw pests away as a trap crop, or simply stay out of the way below the canopy. Avoid other heavy feeders in the same family and anything that shares tomato diseases.
Best Companion Plants for Tomato
These plants grow well alongside Tomato — providing pest control, attracting pollinators, or making better use of your garden space.
Basil repels aphids, whiteflies, and tomato hornworms, and many gardeners find it improves the flavor of nearby tomatoes — it is the classic tomato companion.
Carrots loosen the soil around tomato roots and are harvested before tomatoes need the full space, so the two rarely compete.
French marigolds release compounds that suppress root-knot nematodes and deter whiteflies, a well-documented benefit for tomatoes.
Nasturtium acts as a trap crop, luring aphids and whiteflies away from your tomatoes.
Parsley attracts hoverflies and other beneficial insects that prey on tomato pests.
Chives deter aphids and may help reduce fungal problems with their mild antifungal scent.
Asparagus and tomatoes are mutually beneficial — tomatoes repel asparagus beetles while asparagus repels root nematodes that attack tomatoes.
Calendula attracts pollinators and beneficial predators while drawing aphids away from tomato foliage.
Borage attracts pollinators and predatory insects, deters tomato hornworms, and is said to improve tomato vigor.
What Not to Plant With Tomato
Keep these away from Tomato. They compete for resources, attract shared pests, or inhibit each other's growth.
Cabbage and other brassicas are heavy feeders that compete with tomatoes for nutrients and can stunt their growth.
Broccoli is a heavy-feeding brassica that competes directly with tomatoes for the same soil nutrients.
Cauliflower competes with tomatoes for nutrients and prefers cooler conditions, making it a poor neighbor.
Fennel secretes compounds that inhibit the growth of most vegetables, including tomatoes — keep it in its own bed.
Potatoes share late blight and other diseases with tomatoes and compete underground; keeping them apart limits disease spread.
How to Grow Tomato
- Botanical name
- Solanum lycopersicum
- Family
- Nightshade (Solanaceae)
- Sun
- Full sun, 6–8+ hours daily
- Water
- 1–2 inches per week, deep and consistent at the base
- Soil
- Rich, well-draining loam, pH 6.0–6.8, amended with compost
- Spacing
- 18–36 inches apart (determinate vs. indeterminate); rows 36–48 inches
- Planting depth
- Transplant deep — bury two-thirds of the stem to grow extra roots
- Germination
- 5–10 days at 70–80°F
- Days to maturity
- 60–85 days from transplant
- When to plant
- Transplant 1–2 weeks after your last spring frost, once nights stay above 50°F
- Harvest
- Pick when fruit is fully colored but still firm; harvest regularly to keep plants producing
Common Tomato Problems
Blossom end rot (dark sunken patches on the bottom of fruit)
Caused by calcium uptake issues from inconsistent watering. Water deeply and evenly, mulch to hold moisture, and avoid over-fertilizing with nitrogen.
Tomato hornworms stripping leaves
Handpick the large green caterpillars (look for dark droppings), plant borage and marigolds nearby, and encourage parasitic wasps by leaving any hornworms covered in white cocoons.
Leaves curling or yellowing
Often heat or watering stress, sometimes early blight or nutrient deficiency. Mulch, water consistently, remove lower yellowing leaves, and rotate crops yearly.
Cracked or split fruit
Caused by uneven watering after dry spells. Keep soil moisture steady with mulch and regular deep watering, especially as fruit ripens.
Tomato Companion Planting FAQ
What are the best companion plants for tomatoes?
The best companions for tomatoes are basil, marigolds, nasturtiums, carrots, parsley, chives, borage, calendula, and asparagus. These deter pests like aphids and hornworms, attract pollinators, and make good use of the space around tomato plants.
What should you not plant with tomatoes?
Avoid planting tomatoes near brassicas (cabbage, broccoli, cauliflower), potatoes, corn, and fennel. Brassicas and potatoes compete for nutrients or share diseases, corn shares a damaging pest, and fennel inhibits tomato growth.
Can you plant tomatoes and basil together?
Yes — tomatoes and basil are the classic companion pairing. Basil repels aphids, whiteflies, and hornworms, attracts pollinators, and many gardeners believe it improves tomato flavor. Plant basil 10–12 inches from the base of each tomato.
How far apart should tomatoes be planted?
Space determinate (bush) tomatoes about 18–24 inches apart and indeterminate (vining) tomatoes 24–36 inches apart, with rows 36–48 inches apart for airflow. Good spacing reduces fungal disease and makes harvesting easier.
Neutral neighbors
These can grow near Tomato without notable benefit or harm:
More vegetable companions
Plan Your Tomato Garden
Use our interactive tools to design the perfect garden with Tomato and its companions.