Companion Planting

Companion planting is the practice of planting different species of plants in the same area (and avoiding other certain combinations) for the benefit of the food crops involved. Companion planting can work in several ways:

At a basic level, diversity is good for your garden. Having a mix of plants creates a more resilient backyard ecosystem, whereas large numbers of a single type of crop is more vulnerable to pest or disease attack.
Some plants exude strong essential oil fragrance, that they disguise the smell of neighbouring plants, thus protecting them from predators.
Other plants give off secretions from their roots which benefit nearby plants, or their roots penetrate the soil to such a depth that nutrients are brought up into the upper soil. These deep rooted plants also break up heavy soil.
Tall plants protect smaller plants from sun and wind.
Some plants are visited by bees and other insects, helping to attract pollination and/or beneficial predatory insects

So does it actually work? The best way is to try it out yourself. And report on your results in the forums! In general, some companion planting combinations are well 'proven', while others are more hit and miss. But there is no denying that at the very least, companion planting increases the biodiversity of your patch; that is, the variety of life forms in your garden. This is a very important factor in the health and resilience of your garden ecosystem as a whole.

Here is a table outlining some of the combinations people have reported to be good or bad:

Plant	Good Neighbours	How it works	Bad Neighbours
Apple	Nasturtium, Chives	Nasturtium climbs tree and is said to repel codling moth	Potatoes
Apricot	Basil, Tansy, Asparagus	Basil and tansy are said to repel damaging insects
Asparagus	Apricot, Basil, Chives, Comfrey, Lovage, Marjoram, Parsley, Tomatoes	Basil and Parsley are said to improve flavour. Onions and garlic release substances reducing growth.	Garlic, Onions
Balm (Lemon)	Tomatoes	Attracts bees, said to enhance flavour and growth
Basil	Tomatoes	Basil said to repel flies and mosquitoes
Beans (climbing)	Broccoli, Brussel Sprouts, Cabbage, Carrots, Cauliflower, Corn, Lettuce, Lovage, Majoram, Parsley		Beetroot, Chives, Garlic, Gladiolus, Onions, Sunflower
Beetroot	Beans (bush), Broccoli, Brussel Sprouts, Cabbage, Cauliflower, Kohl Rabi, Lettuce, Lovage, Marjoram, Onion, Peas, Potato, Spinach, Silverbeet	Bad Neighbours roots release substances reducing growth	Beans (Climbing), Tomato
Borage	Squash, Strawberries, Tomato	Said to deter tomato worm and improve tomato flavour and yield. Said to increase strawberry yield.
Brassicas (Incl: Broccoli, Cabbage, Cauliflower)	Beans, Beetroot, Carrots, Chamomile, Coriander, Cucumber, Dill, Lettuce, Lovage, Marjoram, Marigold (French), Mint, Nasturtium, Pea, Potato, Rosemary, Sage, Tansy, Thyme, Zinnias	Dill attracts a Cabbage White Butterfly controlling wasp. Nasturtium disguises and repels aphids. Sage repels the Cabbage White Butterfly. Zinnias attract ladybirds, which we love! Bad Neighbours roots release substances reducing growth	Garlic, Rue, Strawberry, Tomato
Capsicum, Chilli	Carrots, Onions, Tomato
Carrots	Beans, Chives, Coriander, Cucumber, Leeks, Lettuce, Lovage, Marjoram, Onion, Pea, Radish, Rosemary, Sage, Tomato	Bad Neighbours roots release substances reducing growth	Dill, Celery
Celery	Cabbage, Chives, Dill, Dwarf Beans, Leek, Lovage, Majoram, Onion, Pea, Sage, Spinach, Tomato	Bad Neighbours roots release substances reducing growth	Carrots, Parsnip, Potato
Chamomile	Cabbage, Onion	Deters flies and mosquitoes. Strengthens neighbouring plants
Chives	Apples, Cucumbers, Lettuce, Peas	Prevents Apple Scab. Said to deter aphids	Beans
Cucumber	Basil, Bens, Borage, Broccoli, Brussel Sprouts, Cabbage, Carrot, Cauliflower, Corn, Dill Kohl Rabi, Lettuce, Lovage, Marjoram, Nasturtium, Parsnip, Pea, Radish, Sunflower, Tansy	Bad Neighbours roots release substances reducing growth	Potato, Sage, Strongly Aromatic Herbs
Dill	Brassicas (Incl: Broccoli, Cabbage, Cauliflower)	Dill attracts a Cabbage White Butterfly controlling wasp
Eggplant	Beans, Spinach
Garlic	Apricot, Cherry, Mulberry, Parsnip, Peach, Pear, Raspberry, Rosemary, Rose	Deters aphids, especially from roses and raspberry. Repels Cabbage White Butterfly	Beans, Cabbage, Peas, Strawberry
Kohl Rabi	Beetroot, Onion		Beans, Tomato
Leek	Carrot, Celery, Lovage, Majoram, Onion, Parsnip, Strawberry		Beans, Peas, Parsley
Lettuce	Achillea, Beans, Beetroot, Cabbage, Carrot, Chervil, Coreopsis, Cucumber, Lovage, Marjoram, Marigold (French), Onion, Parsnip, Pea, Radish, Strawberry, Zinnia	Achillea, Coreopsis & Zinnia attract pollinators and offer shade for lettuce	Parsley
Marigolds	Everything! Marigolds are a 'legendary' companion crop	Kills root knot nematodes and eel worm
Melon	Radish, Sweet Corn
Mint	Cabbage, Tomato	Deters pests such as Cabbage White Butterfly, ants and fleas
Nasturtium	Cabbages, Fruit Trees, Radishes, Zucchini	Flowers repel aphids and codling moth. Cabbage white butterfly is attracted to this plant, and will seek it out over cabbages
Onion	Beetroot, Broccoli, Cabbage, Carrot, Chamomile, Leeks, Lettuce, Lovage, Marjoram, Parsley, Parsnip, Silverbeet, Strawberry, Summer Savory, Tomato	Smell of onion said to deter numerous pestsOnions release substances reducing growth of Bad Neighbours	Asparagus, Beans, Gladioli, Peas
Parsley	Asparagus, Sweet Corn, Tomato	Said to improve flavour of asparagus and tomato
Peas	Beans, Beetroot, Brussel Sprouts, Cabbage, Carrot, Cauliflower, Celery, Cucumber, Lettuce, Lovage, Marjoram, Parsnip, Potato, Radish, Sage, Squash, Sweet Corn	Bad Neighbours roots release substances reducing growth. Sweet Corn has traditionally been used as "living stakes" for peas	Chives, Garlic, Onion, Shallots
Potato	Beans, Broccoli, Brussel Sprouts, Cabbage, Cauliflower, Corn, Eggplant, Horseradish, Lovage, Marjoram, Marigold (French), Nasturtium, Parsnip, Peas, Sweet Alyssum, Sweet Corn, Watermelon	Sweet Alyssum and Marigolds attract beneficials and suppress weedsPotatoes release substances reducing growth of Bad Neighbours. Horseradish should be planted at the corners of the patch	Apple, Celery, Cherry, Cucumber, Pumpkin, Raspberry, Rosemary, Squash, Sunflower, Tomato
Pumpkin	Beans, Cabbage, Eggplant, Peas, Radish, Sweet Corn	Bad Neighbours roots release substances reducing growth	Potato
Radish	Beans, Carrot, Chervil, Cucumber, Sweet Corn, Cucumber, Lettuce, Lovage, Marjoram, Nasturtium, Parsnip, Pea, Spinach, Sweet Corn	Radish is said to attract leaf miners from Spinach	Hyssop
Raspberry			Blackberries, Potato, Tomato
Rosemary	Beans, Cabbage, Carrot, Sage	Said to deter Cabbage white butterfly. Attracts beneficials
Sage	Brassicas (Incl: Broccoli, Cabbage, Cauliflower), Carrot, Rosemary	Sage repels the Cabbage White Butterfly	Cucumber
Silverbeet	Beetroot, Cherry, Lavender, Lovage, Marjoram, Onion		Basil, Wormwood
Spinach	Celery, Eggplant, Strawberries
Squash	Borage, Lovage, Marjoram, Nasturtium, Peas, Sunflower, Sweet Corn, Tansy		Potato
Strawberry	Beans, Borage, Chives, Leek, Lettuce, Marigold (French), Onion, Pyrethrum, Sage, Spinach		Brassicas (Incl: Broccoli, Cabbage, Cauliflower), Brussel Sprouts, Garlic
Sunflower	Apricots, Cucumbers, Squash		Beans, Potato
Sweet Corn	Beans, Cucumbers, Lovage, Marjoram, Melon, Parsnip, Peas, Potato, Pumpkin, Radish, Squash, Zucchini	Sweet Corn has traditionally been used as "living stakes" for peas. Bad Neighbours roots release substances reducing growth	Cabbage
Tomato	Asparagus, Basil, Celery, Borage, Broccoli, Brussel Sprouts, Carrot, Cauliflower, Celery, Chives, Dill, Gooseberry, Grape, Hyssop, Lovage, Mariglod (French), Marjoram, Mint, Nasturtium, Onion, Parsley, Parsnip, Turnip	Marigolds said to repel white fly and root knot nematode. Bad Neighbours roots release substances reducing growth	Apricots, Beetroot, Cabbage, Fennel, Kohl Rabi, Potato, Rosemary, Sweet Corn
Turnip	Cucumbers, Lettuce, Nasturtium, Peas, Tomato
Watermelon	Potato
Yarrow	Most aromatic herbs	When planted along pathways, is said to enhance essential oil production and herb flavour.
Zucchini	Lovage, Marjoram, Nasturtium, Sweet Corn

And some other plants that are good to have around:

Basil helps repel flies and mosquitoes.
Borage in the strawberry patch will increase the yield.
Catnip repels fleas, ants and rodents.
Caraway helps breakdown heavy soils.
Chamomile deters flies and mosquitoes and gives strength to any plant growing nearby.
Chives grown beneath apple trees will help to prevent apple scab; beneath roses will keep away aphids and blackspot.
Elderberry a general insecticide, the leaves encourage compost fermentation, the flowers and berries make lovely wine!
Fennel (not F. vulgare or F.officionale) repels flies, fleas and ants.
French Marigold root secretions kill nematodes in the soil. Will repel white fly amongst tomatoes.
Garlic helps keep aphids away from roses.
Hyssop attracts cabbage white moth keeping brassicas free from infestation.
Mint repels cabbage white moth. Dried and placed with clothes will repel clothes moth.
Nasturtium secrete a mustard oil, which many insects find attractive and will seek out, particularly the cabbage white moth. Alternatively, the flowers repel aphids and the cucumber beetle. The climbing variety grown up apple trees will repel codling moth.
Pyrethrum will repel bugs if grown around the vegetable garden.
Rosemary repels carrot fly.
Rue (Rutus, not Peganum) keeps cats and dogs off garden beds if planted round the borders.
Sage protects cabbages from cabbage white moth.
Tansy (Tanacetum, not Senecio) repels moths, flies and ants. Plant beneath peach trees to repel harmful flying insects. Tansy leaves assist compost fermentation.
Wormwood (Artemesia, not Ambrosia) although it can inhibit the growth of plants near it, wormwood does repel moths, flies and fleas and keeps animals off the garden.

Site Sections

New forum topics

User login

Navigation

Comments

Are you using Drupal to