Companion Plant Guide
Basil
Masks the scent tomatoes broadcast to pests.
Vegetable · Nightshade family
Tomato companion plants
Solanum lycopersicum
What to plant beside tomato, what to keep apart, and how to grow it — sun, spacing, soil and the pairings used in this guide.
Photo: Alex Ghizila on Unsplash
Overview
Growing tomato beside the right neighbour
Tomato (Solanum lycopersicum) is a vegetable in the Nightshade family. Warm-season fruiting plant that loves sun and support.
The classic bed pairing — basil masks the scent tomatoes broadcast to pests.
Give plants 24–36 in in full sun. Aim for well-draining, fertile soil rich in organic matter. In most gardens the crop sits in USDA zones 2-11 and is ready in about 60-85 days.
Grows well with
What to plant with tomato
The strongest companions for tomato in this guide are Basil, Carrot, Parsley, and Marigold. Each pairing below is a reason to share a bed — pest masking, roots that do not compete, or insects that hunt the pests tomato attracts.
Carrot
Roots sit deeper, so the two do not compete.
Parsley
Umbels draw in the insects that eat tomato pests.
Marigold
Slows whitefly; roots suppress nematodes.
Keep apart
What not to plant with tomato
Keep tomato away from Fennel and Cabbage. These neighbours compete for the same food, release chemicals that stunt growth, or otherwise hold the crop back.
Fennel
Allelopathic — stunts tomatoes and most neighbours.
Cabbage
Both heavy feeders; brassicas and tomatoes compete.
In the bed
How to grow tomato
| Sun | Full sun |
|---|---|
| Spacing | 24–36 in |
| Soil | Well-draining, fertile soil rich in organic matter |
| Hardiness | Zones 2-11 |
| Days to maturity | 60-85 |
These notes sit beside the companion lists — they are how tomato actually occupies the bed, not a substitute for local climate.
- Provide sturdy support or stakes for plants
- Water deeply and consistently at the base
- Prune suckers for better fruit production
- Harvest when fruit is fully colored but still slightly firm
Questions
Tomato companion planting FAQ
What can I plant next to tomato?
Plant Basil, Carrot, Parsley, and Marigold beside tomato. Basil: Masks the scent tomatoes broadcast to pests. Carrot: Roots sit deeper, so the two do not compete. Parsley: Umbels draw in the insects that eat tomato pests. Marigold: Slows whitefly; roots suppress nematodes.
What should I not plant with tomato?
Keep tomato apart from Fennel and Cabbage. Fennel: Allelopathic — stunts tomatoes and most neighbours. Cabbage: Both heavy feeders; brassicas and tomatoes compete.
How much sun does tomato need?
Tomato wants full sun. Space plants 24–36 in apart in well-draining, fertile soil rich in organic matter.
How long does tomato take to mature?
Most tomato crops in this guide mature in 60-85 days, in hardiness zones 2-11.
Compare every pairing at a glance
Open the guide, pick tomato, and see what thrives alongside it — and what quietly holds it back.
Open the pairing guide