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• 1 Vegetables
• 2 Herbs
• 3 Flowers
• 4 Other
• 5 Trees
• 5.1 Apple
• 5.2 Apricot
• 5.3 Walnut
• 6 References
• 7 See also

Vegetables

Common name

scientific name

Helps

Helped by

Attracts

Repels / Distracts

Avoid

Comments

Alliums

Allium

fruit trees, nightshades (tomatoes, peppers, potatoes, etc), brassicas (cabbage, broccoli, kohlrabi, etc) carrots

carrots

slugs, aphids, carrot fly, cabbage worms^[1]

beans, peas, parsley

Alliums include onions, garlic, leeks, shallots, chives, and others

Asparagus

Asparagus officinalis

Tomatoes

Aster Family flowers, Dill ,Coriander, Tomatoes, Parsley, Basil, Comfrey, Marigolds

Onion, Garlic, Potatoes

Marigolds will deter beetles.

Brassicas

Brassica

geraniums, dill, alliums (onions, shallots, garlic, etc), rosemary, nasturtium, borage

mustards, nightshades (tomatoes, peppers, etc)

Brassicas are a family of species which include broccoli, cabbage, brussels sprouts, kholrabi, and cauliflower.

Beans,

Phaseolus

Corn (see Three Sisters), Spinach, lettuce, rosemary, summer savory, dill, carrots, brassicas, beets, radish, strawberry and cucumbers

Eggplant, Summer savory

California beetles

Tomatoes, chili peppers, sunflowers, alliums (onions, garlic, etc), kales (cabbage, broccoli, etc)

Hosts nitrogen-fixing bacteria, a good fertilizer for some plants, too much for others

Beets,

Beta Vulgaris

lettuce, kohlrabi, onions and brassicas

Catnip, Garlic, Mint

Runner or pole beans

Good for adding minerals to the soil through composting leafs which have up to 25% magnesium. Runner or pole beans and beets stunt each other's growth.

Broccoli

Brassica oleracea

geraniums, dill, alliums, rosemary, nasturtium, borage

mustards, Tomatoes, peppers

Rosemary repels cabbage fly, geraniums trap cabbage worms, same general companion profile as all brassica (cabbage, kolhrabi, brussels sprouts, cauliflower, etc)

Cabbage

Brassica oleracea

geraniums, dill, alliums, rosemary

mustards, Tomatoes, peppers strawberries, and pole/runner beans

Rosemary repels cabbage flies, geraniums trap cabbage worms, same general companion profile as all brassica (cabbage, kolhrabi, brussels sprouts, cauliflower, etc)

Carrots

Daucus carota

Tomatoes, Alliums (onions, chives, etc), lettuce

alliums (leeks, shallots, etc), rosemary, wormwood, sage, beans, flax

assassin bug, lacewing, parasitic wasp, yellow jacket and other predatory wasps

Dill, parsnip, radish

Tomatoes grow better with carrots, but may stunt the carrots' growth. Beans (which are bad for tomatoes) provide the nitrogen carrots need more than some other vegetables. Aromatic companion plants repel carrot fly. Sage, rosemary, and radishes are recommended by some as companion plants, but listed by others as incompatible. alliums interplanted with carrots confuse onion and carrot flies. For the beneficial insect-attracting properties of carrots to work, they need to be allowed to flower; Otherwise, use the wild carrot, Queen Anne's Lace, for the same effect. Flax produces an oil that may protect root vegetables like carrots from some pests.

Celery,

Apium graveolens

Cosmos, Daisies, Snapdragons

corn, Aster flowers, these can transmit the aster yellows disease

Corn / Maize

Zea mays

beans

Sunflowers, legumes (beans, peas, soybeans etc), peanuts, curcubits (squash, cucumbers, melons, etc), amaranth, white geranium, lamb's quarters, morning glory, parsley, and potato

Tomato, Celery

provides beans with a trellis, is protected from predators and dryness by cucurbits, in the three sisters technique

Cucumber

Cucumis Sativus

Nasturtiums, radishes, marigolds, sunflowers peas, beets, carrots, and Dill

Beneficial for ground beetles

Tomato, Sage

Common name

scientific name

Helps

Helped by

Attracts

Repels / Distracts

Avoid

Comments

Eggplant

Solanum melongena

Beans, Peppers

Marigolds, tarragon, mints

Runner beans

Marigolds will deter nematodes.

Leek

Allium ampeloprasum v. porrum

Celery, apple trees

carrots

cabbage worms, aphids, carrot fly, others

Legumes (beans, peas, etc)

Same companion traits as all alliums (onions, garlic, shallots, chives, etc)

Lettuce

Lactuca sativa

Radish, Kohlrabi, beans, carrots

celery, cabbage, cress, parsley

Mints (including hyssop, sage, and various "balms") repel slugs, a bane of lettuce and cabbages

Mustard

Brassicaceae, Sinapis alba

Cabbage, cauliflower, radish, brussels sprouts, turnips

various pests

same general companion profile as all brassica (cabbage, kolhrabi, brussels sprouts, cauliflower, etc)

Nightshades

Solanaceae

carrots, alliums, mints (basil, oregano, etc)

beans, black walnuts, corn, fennel, dill, brassica (broccoli, cabbage, cauliflower, etc)

Nightshade plants include tomatoes, tobacco, chili peppers (including bell peppers), potatoes, eggplant, and others

Common name

scientific name

Helps

Helped by

Attracts

Repels / Distracts

Avoid

Comments

Peppers

Solanaceae, Capsicum

themselves, marjoram

tomatoes, geraniums, petunias

beans, kale (cabbage, brussels sprouts, etc)

Pepper plants like high humidity, which can be helped along by planting with some kind of dense-leaf or ground-cover companion, like majoram and basil; they also need direct sunlight, but their fruit can be harmed by it...pepper plants grown together, or with tomatoes, can shelter the fruit from sunlight, and raises the humidity level.

Onion

Allium cepa

Tomatoes, Kales (broccoli, cabbage, etc)

Carrots

aphids, carrot fly, other pests

beans, peas, parsley

Same companion traits as all other alliums (chives, garlic, shallots, leeks, etc)

Potato

Solanum tuberosum

Horseradish

Sunflower, Tomato, Cucumber

horseradish increases the disease resistance of potatoes

Pumpkin Squash

Curcurbita spp

corn, beans

Buckwheat, catnip, tansy, radishes

Spiders, Ground Beetles

Flea Beetles are warded off by radishes, Curcurbita can be used in the three sisters technique

Spinach

Spinacia oleracea

Peas, Beans

The peas and beans provide natural shade for the spinach

Tomatoes

Solanum lycopersicum

roses, peppers, asparagus

basil, oregano, parsley, carrots, marigold, Alliums, celery, Geraniums, Petunias, Nasturtium, Borage, any type of onion or chives

asparagus beetle

Black walnut, corn, fennel, peas, dill, potatoes, beetroot, brassicas (kohlrabi, cabbage, etc), rosemary

Black walnuts inhibit tomato growth, in fact they are allelopathic to all other nightshade plants (chili pepper, potato, tobacco, petunia) as well, because it produces a chemical called juglone.

Herbs

Common name

scientific name

Helps

Helped by

Attracts

Repels / Distracts

Avoid

Comments

Basil

Ocimum basilicum

tomato, peppers, oregano, asparagus, petunias

chamomile, anise

butterflies

asparagus beetle, mosquitoes and flies

common rue, sage, rosemary (basil will kill your rosemary)

is said to make tomatoes taste better, chamomile and anise are supposed to increase the essential oils in many herbs like basil

Borage

Borago officinalis

Almost everything, especially strawberry, cucurbits (cucumber, gourds), tomatoes

Predatory insects, honeybees

many pests

Borage is the magic bullet of companion plants

Caraway

Carum carvi

Strawberries

Parasitic wasps, parasitic flies

Chamomile

Matricaria recutita

Basil, Wheat, Onion, Cabbage, Cucumber

Hoverflies, wasps

Growing near herbs will increase their oil production.

Chervil

Anthriscus cerefolium

Radish, lettuce, broccoli

aphids

loves shade, fortunately it grows well with shade-tolerant food plants; will make radishes grown near it taste spicier

Cilantro / Coriander

Coriandrum sativum

spinach

beans, peas

tachinid fly

aphids

chives

Allium schoenoprasum

Apples, carrots, tomatoes, brassica (broccoli, cabbage, mustard, etc), many others

carrots

cabbage worms, carrot fly, aphids

beans, peas

Same companion traits as all alliums (onions, garlic, shallots, leeks, etc)said to prevent apple scab after 3 years planting at base of apple trees

Coriander,

[[]]

aphids, spider mites and potato beetle

Common name

scientific name

Helps

Helped by

Attracts

Repels / Distracts

Avoid

Comments

Dill

Anethum graveolens

Cabbages, Corn, Lettuce, Onions, Cucumbers

Hoverflies, Wasps, Tomato Horn Worms, honeybees, Ichneumonid Wasps

Aphids, spider mites, squash bugs, cabbage looper

carrots, tomatoes

one of the few plants said to grow with fennel

Fennel

Foeniculum vulgare

Dill

Dill

ladybugs, syrphid fly, tachinid fly

aphids

Almost everything

Fennel is allelopathic to most garden plants, inhibiting growth, causing to bolt, or actually killing many plants

Garlic

Allium sativum

Apple trees, Pear trees, Roses, Cucumbers, Peas, Lettuce, Celery

Aphids, cabbage looper, ants, rabbits, cabbage maggot

Deters rabbits, same companion traits as all alliums (onions, chives, shallots, leeks, etc)

Hemp

Cannabis sativa L. subsp. sativa

Brassica (cabbage, brussels sprouts, other kales)

Repels many types of beetles which attack cabbages.

Hyssop

Hyssopus officinalis

Cabbage, grapes

honeybees, butterflies

Cabbage moth larvae, Cabbage Butterflies

Stimulates growth of grapes.

Lovage

Levisticum officinale

Almost all plants

beans

Ichneumonid Wasps, ground beetles (good)

rhubarb

Is thought to improve the health of almost all plants, like borage and geraniums, is considered a "magic bullet" of companion planting

Oregano

Origanum vulgare

Tomatoes, peppers, many other plants

basil

aphids

provides ground cover and much-needed humidity for pepper plants if allowed to spread among them

Common name

scientific name

Helps

Helped by

Attracts

Repels / Distracts

Avoid

Comments

Peppermint

Mentha piperita

Brassica (cabbage, kholrabi, broccoli, and the other kales)

cabbage fly, ants, cabbage looper

Repels cabbage flies, has same general companion properties as other mints

Rosemary

Rosmarinus officinalis

sage, cabbage, beans, carrots

bean beetle

Basil

Deters cabbage flies, repels many bean parasites

Sage

Salvia officinalis

rosemary, cabbage, beans, carrots

honeybees, cabbage butterfly

cabbage flies, carrot fly, black flea beetle, cabbage looper, cabbage maggot

Deters cabbage flies, repels many bean parasites

Southernwood

Artemisia abrotanum

Fruit trees

Controls cabbage moths and malaria mosquitoes.

Spearmint

Mentha spicata

ants, aphids

Controls ants and aphids, has same general companion properties as other mints.

Summer Savoury

Satureja hortensis

Green beans, onions,

also delays germination of certain foul herbs

Tansy

Tanacetum vulgare

beans, cucurbits (cucumbers, squash, etc), corn, roses

honeybees

flying insects(Ichneumonid Wasps), Japanese beetles, striped cucumber beetles, squash bugs and ants

Is reputed to generally repel insects (except for nectar-eating types). This herb should not be consumed, as it is quite toxic.

Flowers

Common Name

Latin Name

Helps

Helped by

Attracts

Repels / Distracts

Avoid

Comments

Geraniums

Pelargonium spp.

Roses, tomatoes, peppers, grapes

leafhoppers, Japanese beetles

A trap crop, attracting pests away from roses and grape vines, distracts beet leafhoppers, carrier of the curly top virus, away from Solanaceous plants like tomatoes, peppers, eggplant, and tobacco

Marigold

Asteraceae Calendula Tagetes

most plants, especially tomatoes and peppers, cucurbits (cucumbers, gourds, squash), brassicas (broccoli, kale, cabbage)

nematodes, beet leaf hoppers, other pests

Marigolds are a wonder-drug of the companion plant world, invoking the saying "plant them everywhere in your garden". French marigolds produce a pesticidal chemical from their roots, so strong it lasts years after they are gone. Mexican marigolds do the same, but are so strong they will inhibit the growth of some more tender herbs. Certain Varieties of marigolds (Tagetes) can help manage eelworms (Root-knot nematode) when planted the year before[1].

Tagetes has also been found effective against perennial weeds such as Ranunculus ficaria (Celandine), Aegopodium podagraria (Ground elder), Glechoma hederacea (Ground ivy), Agropyron repens (Couch grass), Convolvulus arvensis (Field bindweed), Equisetum arvense (Field/Common Horsetail) and other 'starchy' weeds.

Petunia

Petunia x hybrida

cucurbits (squash, pumpkins, cucumbers), asparagus

leafhoppers, Japanese beetles, aphids, asparagus beetle

Is a trap crop almost identical to geraniums in function

Nasturtium

Tropaeolum majus

Many plants, especially cucurbits (melons, cucumbers, gourds), beans, tomatoes, apple trees, brassicas (broccoli, cabbage, etc), radish

predatory insects

aphids, cabbage looper, squash bug, white fly, cucumber beetles

radish, cauliflower

Both work as trap crops for aphids, is among the best at attracting predatory insects^{[citation needed]}

Sunflower

Helianthus annuus

corn, tomatoes

aphids

Was grown as a companion for corn(maize) before modern Europeans arrived in the Americas, supposedly increases their production, ants herd aphids onto sunflowers, keeping them off neighboring plants

Tansy

Tanacetum vulgare

cucurbits (cucumbers, squash, etc), raspberries and relatives, roses, corn

sugar ants, Japanese beetles, cucumber beetles, squash bugs, mice

Toxic to many animals, don't plant it where livestock browse

Yarrow

Achillea millefolium

many plants

predatory wasps, ladybugs, hoverflies, damselbugs

May increase the essential oil production of some herbs. Also improves soil quality, use the leaves to enrich compost, or as mulch.

Other

Common Name

Latin Name

Helps

Helped by

Attracts

Repels / Distracts

Avoid

Comments

Alfalfa

Medicago sativa

Cotton

assassin bug, big-eyed bug, Ladybug, parastic wasps

Lygus bugs

Used by farmers to reduce cotton pests, a good crop to improve soil; fixes nitrogen like beans do. Also breaks up hardpan and other tough soil.

APPLE TREES

Common Name

Latin Name

Helps

Helped by

Attracts

Repels / Distracts

Avoid

Comments

Apple

Malus domestica

Clover, Chive, Garlic, Leek, Nasturtium, Southernwood

APRICOT TREES

Common Name

Latin Name

Helps

Helped by

Attracts

Repels / Distracts

Avoid

Comments

Apricot

Prunus armeniaca

A fungus that peppers are prone to can infect apricot trees causing a lot of harm.

WALNUT TREES

Common Name

Latin Name

Helps

Helped by

Attracts

Repels / Distracts

Avoid

Comments

Walnut

Juglans

Black walnut is harmful to the growth of all nightshade plants, including Datura or Jimson weed, eggplant, mandrake, deadly nightshade or belladonna, capsicum (paprika, chile pepper), potato, tobacco, tomato, and petunia.

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