Companion Planting Chart

Companion planting puts the right neighbours together — some plants deter each other's pests, attract pollinators or improve growth, while a few are best kept apart. Use this quick chart for common UK crops to plan a healthier, more productive plot.

Crop	✔ Grows well with	✘ Keep apart from
Tomato	Basil Marigold Chives Carrot	Potato Fennel
Carrot	Onion Chives Pea Lettuce Sage	Dill
Onion	Carrot Beetroot Lettuce Strawberry	Pea
Pea	Carrot Courgette Sunflower	Onion Chives
Lettuce	Carrot Onion Beetroot Strawberry	—
Courgette	Sunflower Marigold Pea	Potato
Pumpkin	Sunflower Marigold Pea	Potato
Potato	Marigold Pea	Tomato Pumpkin
Beetroot	Onion Lettuce	Pea
Strawberry	Lettuce Onion Sage	—

How to use companion planting

Mix it up. Interplanting crops and flowers makes it harder for pests to find and spread between their target plants.
Invite the good guys. Marigolds, pot marigolds and sunflowers draw in pollinators and predatory insects that keep aphids and other pests down.
Mind the clashes. A few pairings compete or share pests — the "keep apart" column flags the common ones to separate across the plot.
Rotate each year. Companion planting works alongside crop rotation, not instead of it — move your crop families to fresh ground annually.

A practical planning guide based on widely-used UK companion-planting practice — results vary with your soil, site and season.

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