Cabbage

Onion

Onions are said to deter cabbage worms and aphids.

Celery celeriac

Celery is a good companion, improving growth and flavor.

Spearmint

Mint is believed to repel cabbage moths.

Rosemary

Repels cabbage moth.

Garden pea

Peas provide nitrogen to brassicas, which are heavy feeders.

Summer savory

May deter cabbage worms and other brassica pests.

Potato

Potatoes can benefit brassicas by deterring flea beetles, but can also compete for nutrients.

Common Thyme

Repels cabbage worms and whiteflies, improving growth and yield.

Stinging Nettle

Nettle is said to improve the growth and health of brassicas.

Broad Bean

Broad beans fix nitrogen, which benefits brassicas. They also provide some ground cover and can deter some pests.

Walking onion

Deters cabbage worms.

Welsh onion

Deters cabbage worms.

Horseradish

Reported to deter cabbage worms.

Winter savory

Repels cabbage moths.

Hyssop

Helps deter cabbage moths and flea beetles.

Crimson clover

Can be interplanted with brassicas to provide nitrogen and ground cover.

Peppermint

Repels cabbage worms and flea beetles from brassicas.

White Clover

Can improve soil health and suppress weeds in brassica beds.

Spinach

Spinach can be a good companion for brassicas, helping to suppress weeds and keep the soil cool.

Salad rocket

Can be grown near other brassicas, but monitor for shared pests.

Nasturtium

Acts as a trap crop for aphids and cabbage worms, protecting brassicas.

Runner bean

Beans can provide nitrogen to brassicas.

Fennel

Fennel is often considered a poor companion for many plants, but some sources suggest it can be neutral or even beneficial for brassicas by attracting beneficial insects.

Common bean

Beans can provide nitrogen to brassicas, which are heavy nitrogen feeders.

French marigold

May deter cabbage worms and other brassica pests.

Yarrow

Reported to improve growth and flavor of cabbage family plants.

Leek

Leeks can help deter aphids from brassicas.

Chives

Deters cabbage worms.

Garlic

May deter cabbage loopers and other brassica pests.

Dill

Dill is said to improve the growth and health of cabbage family plants and deter cabbage loopers.

Beetroot chard

Benefits from being planted near cabbage family members.

Borage

Attracts beneficial insects that prey on cabbage worms and other brassica pests.

Turnip

Can be grown together, but share common pests and diseases.

Pot Marigold

Attracts beneficial insects that prey on cabbage pests.

Caraway

Reported to improve growth and flavor of brassicas.

Endive

Benefits from the shade provided by taller brassicas in hot weather.

Cilantro

Reported to deter pests from brassicas.

German chamomile

Reported to improve growth and flavor of cabbage family plants.

Catnip

Reported to deter flea beetles from brassicas.

Sweet marjoram

Reported to enhance growth and flavor of cabbage family plants.

Oregano

Repels cabbage moths.

Sage

Sage is said to deter cabbage moths and other pests from brassicas.

Feverfew

Helps deter cabbage worms and other pests from brassicas.