Companion Planting

From Sustainable Gardening Australia (http://www.sgaonline.org.au)

PlantGood NeighboursHow it worksBad Neighbours
AppleNasturtium, ChivesNasturtium climbs tree and is said to repel codling mothPotatoes
ApricotBasil, Tansy, AsparagusBasil and tansy are said to repel damaging insects
AsparagusApricot, Basil, Chives, Comfrey, Lovage, Marjoram, Parsley, TomatoesBasil and Parsley are said to improve flavour. Onions and garlic release substances reducing growth.Garlic, Onions
Balm (Lemon)TomatoesAttracts bees, said to enhance flavour and growth
BasilTomatoesBasil said to repel flies and mosquitoes
Beans (climbing)Broccoli, Brussel Sprouts, Cabbage, Carrots, Cauliflower, Corn, Lettuce, Lovage, Majoram, ParsleyBeetroot, Chives, Garlic, Gladiolus, Onions, Sunflower
BeetrootBeans (bush), Broccoli, Brussel Sprouts, Cabbage, Cauliflower, Kohl Rabi, Lettuce, Lovage, Marjoram, Onion, Peas, Potato, Spinach, SilverbeetBad Neighbours roots release substances reducing growthBeans (Climbing), Tomato
BorageSquash, Strawberries, TomatoSaid 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,TomatoZinniasDill 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 growthGarlic, Rue, Strawberry
Capsicum, ChilliCarrots, Onions, Tomato
CarrotsBeans, Chives, Coriander, Cucumber, Leeks, Lettuce, Lovage, Marjoram, Onion, Pea, Radish, Rosemary, Sage, TomatoBad Neighbours roots release substances reducing growthDill, Celery
CeleryCabbage, Chives, Dill, Dwarf Beans, Leek, Lovage, Majoram, Onion, Pea, Sage, Spinach, TomatoBad Neighbours roots release substances reducing growthCarrots, Parsnip, Potato
ChamomileCabbage, OnionDeters flies and mosquitoes. Strengthens neighbouring plants
ChivesApples, Cucumbers, Lettuce, PeasPrevents Apple Scab. Said to deter aphidsBeans
CucumberBasil, Bens, Borage, Broccoli, Brussel Sprouts, Cabbage, Carrot, Cauliflower, Corn, Dill Kohl Rabi, Lettuce, Lovage, Marjoram, Nasturtium, Parsnip, Pea, Radish, Sunflower, TansyBad Neighbours roots release substances reducing growthPotato, Sage, Strongly Aromatic Herbs
DillBrassicas (Incl: Broccoli, Cabbage, Cauliflower)Dill attracts a Cabbage White Butterfly controlling wasp
EggplantBeans, Spinach
GarlicApricot, Cherry, Mulberry, Parsnip, Peach, Pear, Raspberry, Rosemary, RoseDeters aphids, especially from roses and raspberry. Repels Cabbage White ButterflyBeans, Cabbage, Peas, Strawberry
Kohl RabiBeetroot, OnionBeans, Tomato
LeekCarrot, Celery, Lovage, Majoram, Onion, Parsnip, StrawberryBeans, Peas, Parsley
LettuceAchillea, Beans, Beetroot, Cabbage, Carrot, Chervil, Coreopsis, Cucumber, Lovage, Marjoram, Marigold (French), Onion, Parsnip, Pea, Radish, Strawberry, ZinniaAchillea, Coreopsis & Zinnia attract pollinators and offer shade for lettuceParsley
Marigolds (French)Numerous vegetables, including tomatoKills root knot nematodes and eel worm
MelonRadish, Sweet Corn
MintCabbage, TomatoDeters pests such as Cabbage White Butterfly, ants and fleas
NasturtiumCabbages, Fruit Trees, Radishes, ZucchiniFlowers repel aphids and codling moth. Cabbage white butterfly is attracted to this plant, and will seek it out over cabbages
OnionBeetroot, Broccoli, Cabbage, Carrot, Chamomile, Leeks, Lettuce, Lovage, Marjoram, Parsley, Parsnip, Silverbeet, Strawberry, Summer Savory, TomatoSmell of onion said to deter numerous pestsOnions release substances reducing growth of Bad NeighboursAsparagus, Beans, Gladioli, Peas
ParsleyAsparagus, Sweet Corn, TomatoSaid to improve flavour of asparagus and tomato
PeasBeans, Beetroot, Brussel Sprouts, Cabbage, Carrot, Cauliflower, Celery, Cucumber, Lettuce, Lovage, Marjoram, Parsnip, Potato, Radish, Sage, Squash, Sweet CornBad Neighbours roots release substances reducing growth. Sweet Corn has traditionally been used as “living stakes” for peasChives, Garlic, Onion, Shallots
PotatoBeans, Broccoli, Brussel Sprouts, Cabbage, Cauliflower, Corn, Eggplant, Horseradish, Lovage, Marjoram, Marigold (French), Nasturtium, Parsnip, Peas, Sweet Alyssum, Sweet Corn, WatermelonSweet Alyssum and Marigolds attract beneficials and suppress weedsPotatoes release substances reducing growth of Bad Neighbours. Horseradish should be planted at the corners of the patchApple, Celery, Cherry, Cucumber, Pumpkin, Raspberry, Rosemary, Squash, Sunflower, Tomato
PumpkinBeans, Cabbage, Eggplant, Peas, Radish, Sweet CornBad Neighbours roots release substances reducing growthPotato
RadishBeans, Carrot, Chervil, Cucumber, Sweet Corn, Cucumber, Lettuce, Lovage, Marjoram, Nasturtium, Parsnip, Pea, Spinach, Sweet CornRadish is said to attract leaf miners from SpinachHyssop
RaspberryBlackberries, Potato, Tomato
RosemaryBeans, Cabbage, Carrot, SageSaid to deter Cabbage white butterfly. Attracts beneficials
SageBrassicas (Incl: Broccoli, Cabbage, Cauliflower), Carrot, RosemarySage repels the Cabbage White ButterflyCucumber
SilverbeetBeetroot, Cherry, Lavender, Lovage, Marjoram, OnionBasil, Wormwood
SpinachCelery, Eggplant, Strawberries
SquashBorage, Lovage, Marjoram, Nasturtium, Peas, Sunflower, Sweet Corn, TansyPotato
StrawberryBeans, Borage, Chives, Leek, Lettuce, Marigold (French), Onion, Pyrethrum, Sage, SpinachBrassicas (Incl: Broccoli, Cabbage, Cauliflower), Brussel Sprouts, Garlic
SunflowerApricots, Cucumbers, SquashBeans, Potato
Sweet CornBeans, Cucumbers, Lovage, Marjoram, Melon, Parsnip, Peas, Potato, Pumpkin, Radish, Squash, ZucchiniSweet Corn has traditionally been used as “living stakes” for peas. Bad Neighbours roots release substances reducing growthCabbage
TomatoAsparagus, Basil, Celery, Borage, Broccoli, Brussel Sprouts, Cabbage, Carrot, Cauliflower, Celery, Chives, Dill, Gooseberry, Grape, Hyssop, Lovage, Mariglod (French), Marjoram, Mint, Nasturtium, Onion, Parsley, Parsnip, TurnipMarigolds said to repel white fly and root knot nematode. Bad Neighbours roots release substances reducing growthApricots, Beetroot,  Fennel, Kohl Rabi, Potato, Rosemary, Sweet Corn
TurnipCucumbers, Lettuce, Nasturtium, Peas, Tomato
YarrowMost aromatic herbsWhen planted along pathways, is said to enhance essential oil production and herb flavour.
ZucchiniLovage, Marjoram, Nasturtium, Sweet Corn


a couple of general plants that make great companions for other reasons

  • 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.

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