Companion planting guide from Thompson and Morgan

Companion planting is a natural way to deter pests from damaging fruit and vegetable crops and can also help with pollination. companion plant?

In the chart below Thompson and Morgan have put together “the best known partnerships in flowers, herbs and vegetables to help you improve the health of your garden plants without needing to resort to pesticides”.

Companion planting chart

Companion plant 1	Companion plant 2	How does it work
Cabbage, kale,cauliflower	Nasturtium	Plant Nasturtiums as a sacrificial crop. Cabbage white butterflies will lay their eggs on Nasturtium plants, keeping caterpillars away from your Brassicas.
Cabbage, kale,cauliflower	Mint	Mint helps to deter flea beetles, which chew irregular holes in the leaves.
Courgette	Calendula(English Marigold)	Calendula flowers are highly attractive to pollinating insects which will in turn pollinate your courgette flowers.
Broad beans	Summer savory	Summer savory helps to repel blackfly, a common pest of broads beans.
Carrot	Spring onions	Sow spring onions amongst your carrots - the smell of onion deters carrot root fly. The smell of carrots also deters onion fly from onions.
Carrot	Leek	The smell of leeks deters carrot root fly. The smell of carrots also helps deter leek moth from leeks.
Carrot	Mint	The aromatic leaves of mint help confuse carrot root fly, who find their host through scent.
Chrysanthemum	Chives	The onion scent will deter aphids.
French /Runner beans	Nasturtium	Plant Nasturtiums as a sacrificial crop - aphids love them and this will lure them away from your runner beans/French beans.
Onion	Mint	The aromatic leaves of mint help to confuse and deter onion fly.
Radish	Mint	Mint helps to deter flea beetles, which chew irregular holes in the leaves.
Roses	Garlic	The smell of garlic helps to deter aphids.
Roses	Mint, Chives ,thyme	The strong scent of these herbs deters aphids and blackfly.
Runner beans	Sweet peas	Sweet peas will attract pollinating insects which will in turn help to pollinate your bean flowers.
Sunflower	Chives	The onion scent will deter aphids.
Tomatoes	Mint	The smell of mint deters aphids and other pests.
Tomatoes	French Marigold(Tagetes patula)	The pungent smell of French marigolds deters whitefly.
Tomatoes	Chives	The onion scent will deter aphids.
Tomatoes	Basil	Basil reportedly improves tomato flavour and the strong scent of their leaves also deters aphids. A perfect partnership in the kitchen too!

For more detailed information please visit the Thompson and Morgan website here.