List of companion plants
This article includes a list of general references, but it lacks sufficient corresponding inline citations. (September 2010) |
This is a list of companion plant relationships. Many more are in the list of beneficial weeds.
The purpose of this list is to provide plants that assist in the growth of others, be it attracting beneficial insects, naturally regulating pests, repelling harmful insects, providing nutrients, part of a biological pest control program, and in some cases simply a shaded microclimate or climbing support.
Vegetables
Vegetables | ||||||||
---|---|---|---|---|---|---|---|---|
Common name | Scientific name | Helps | Helped by | Attracts | Repels/Distracts | Avoid | Comments | |
Alliums | Allium | fruit trees, nightshades (tomatoes, peppers, potatoes), 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[2] | Aster Family flowers, Dill, Coriander, Tomatoes, Parsley, Basil, Comfrey, Marigolds | Onion, Garlic, Potatoes | Marigolds will deter beetles. | |||
Brassicas | Brassica | potatoes, cereals (e.g. corn, wheat) | geraniums, dill, alliums (onions, shallots, garlic, etc), rosemary, nasturtium, borage | wireworms | mustards, nightshades (tomatoes, peppers, etc) | Brassicas are a family of species which include broccoli, cabbage, brussels sprouts, kohlrabi, 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, alliums (onions, garlic, etc), brassicas (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[2] | Good for adding minerals to the soil through composting leaves 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, kohlrabi, 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, kohlrabi, 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 inter-planted 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, cucurbits (squash, cucumbers, melons, etc), amaranth, white geranium, lamb's quarters, morning glory, parsley, and potato[2] | 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 or Aubergine | Solanum melongena | Beans, Peppers | Marigolds, tarragon, mints | Marigolds will deter nematodes. | ||||
Leek | Allium ampeloprasum v. porrum | Celery, apple trees | carrots | cabbage worms, aphids, carrot fly, others | Legumes (beans, peas, etc), Swiss chard | 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, kohlrabi, 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 | |
Onion | Allium cepa | Tomatoes, brassicas (broccoli, cabbage, etc) | Carrots | aphids, carrot fly, other pests | Beans, lentils, peas, parsley | Same companion traits as all other alliums (chives, garlic, shallots, leeks, etc) | ||
Peppers | Solanaceae, Capsicum | themselves, marjoram | tomatoes, geraniums, petunias | Tomato Horn worm | 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 marjoram 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. | ||
Potato | Solanum tuberosum | Horseradish | Atriplex, carrot, cucumber, oignon, raspberries, squash, sunflower, tomato | Horseradish increases the disease resistance of potatoes | ||||
Parsnip | Pastinaca Sativa | fruit trees | a variety of predatory insects | The flowers of the parsnip plant left to seed will attract a variety of predatory insects to the garden, they are particularly helpful when left under fruit trees, the predators attacking codling moth and light brown apple moth. The root also contains Myristricin, which is toxic to fuit flies, house flies, red spider mite, pea aphids, an simple blender made extraction of three blended parsnips roots to one litre of water through a food processor (not one for preparing food) and left overnight, strained and use within a few days. | ||||
Pumpkin and other Squash | Curcurbita spp | corn, beans | Buckwheat, catnip, tansy, radishes | Spiders, Ground Beetles | Radishes can be used as a trap crop against flea beetles, Curcurbita can be used in the three sisters technique | |||
Radish | Rafanus Sativus | squash, eggplant, cucumber[2], lettuce | flea beetles, cucumber beetles | Radishes can be used as a trap crop against flea beetles | ||||
Spinach | Spinacia oleracea | Peas, Beans | The peas and beans provide natural shade for the spinach | |||||
Tomatoes | Solanum lycopersicum | roses, peppers, asparagus | basil[3], oregano, parsley, carrots, marigold, Alliums, celery, Geraniums, Petunias, Nasturtium, Borage, any type of onion or chives | Tomato Hornworm | 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. Dill attracts tomato horn worm. Growing tomatoes with Basil does not appear to enhance tomato flavor but studies have shown that growing them around 10 inches apart can increase the yield of tomatoes by about 20%.[3] |
Herbs
Herbs | |||||||
---|---|---|---|---|---|---|---|
Common name | Scientific name | Helps | Helped by | Attracts | Repels / Distracts | Avoid | Comments |
Basil | Ocimum basilicum | tomato[3], peppers, oregano, asparagus, petunias | chamomile, anise | butterflies | asparagus beetle, mosquitoes, thrips and flies | common rue | 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 and cabbage | Predatory insects, honeybees | many pests | Predict a square meter for its adult size. Borage is the magic bullet of companion plants[citation needed] | ||
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 | radish | 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, spider mites, white flies and potato beetle | ||
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 | |
Common name | Scientific name | Helps | Helped by | Attracts | Repels / Distracts | Avoid | Comments |
Dill | Anethum graveolens | Cabbages, Corn, Lettuce, Onions, Cucumbers | Tiger Swallowtail butterflies/caterpillars, 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, Lettuce, Celery | Aphids, cabbage looper, ants, rabbits, cabbage maggot | Beans, cabbages, peas | 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 | ||
Parsley | Petroselinum Crispum | Asparagus, corn/maize, tomatoes | Swallowtail Butterflies, wasps, flies | Alliums, lettuce | Sacrificially attracts insects that predate upon tomatoes | ||
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. | ||
Tarragon | Artemisia dracunculus | Everything, but especially eggplant | Its scent is disliked by most pests, and this plant is also thought to have Nurse Plant properties, enhancing the growth and flavor of crops grown with it. | ||||
Thyme | Cabbage and broccoli | Deters white fly |
Flowers
Flowers | ||||||||
---|---|---|---|---|---|---|---|---|
Common Name | Latin Name | Helps | Helped by | Attracts | Repels / Distracts | Avoid | Comments | |
Geraniums | Pelargonium spp. | Roses, corn, peppers, grapes | leafhoppers, Japanese beetles | Tomatoes, Tobacco, Eggplants and other nightshades | A trap crop, attracting pests away from roses and grape vines, distracts beet leafhoppers, carrier of the curly top virus, keep away from Solanaceous plants like eggplant, and tobacco | |||
Lupin | Lupinus | Cucurbits, brassica, lettuce, rosemary, dill, strawberry | summer savory | Honeybees | tomatoes and other solanaceae | This wildflower is a legume, hosting bacteria that fixes nitrogen in the soil, fertilizing it for neighboring plants | ||
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.[citation needed] | ||||
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[citation needed] | predatory insects | aphids, cabbage looper, squash bug, white fly, cucumber beetles | radish[citation needed], 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. | ||||
Zinnia | Zinnia | beans, tomatoes, peppers | whiteflies | Attracts hummingbirds that eat whitflies, attracts pollinators |
Other
Other | |||||||
---|---|---|---|---|---|---|---|
Common Name | Latin Name | Helps | Helped by | Attracts | Repels / Distracts | Avoid | Comments |
Alfalfa | Medicago sativa | Cotton | assassin bug, big-eyed bug, Ladybug, parasitic 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. |
Trees
Apple
APPLE TREES | |||||||
---|---|---|---|---|---|---|---|
Common Name | Latin Name | Helps | Helped by | Attracts | Repels / Distracts | Avoid | Comments |
Apple | Malus domestica | Clover, Chive, Garlic, Leek, Nasturtium, Southernwood, Daffodils, Comfrey | Cedar because of apple-cedar rust.
Walnut because its roots produce growth inhibitors that apple trees are sensitive to[4] |
Apricot
APRICOT TREES | |||||||
---|---|---|---|---|---|---|---|
Common Name | Latin Name | Helps | Helped by | Attracts | Repels / Distracts | Avoid | Comments |
Apricot | Prunus armeniaca | peppers | A fungus that peppers are prone to can infect apricot trees causing a lot of harm. |
Walnut
WALNUT TREES | |||||||
---|---|---|---|---|---|---|---|
Common Name | Latin Name | Helps | Helped by | Attracts | Repels / Distracts | Avoid | Comments |
Walnut | Juglans | European Alder (sacrifice plant) | 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, tomato, and petunia. |
See also
- Biological pest control
- Food combining
- Foodpairing
- List of beneficial weeds
- List of pest-regulating plants
- List of repellent plants
- Push–pull technology; (pest control strategy for maize and sorghum)
- Sustainable agriculture
- Sustainable landscaping
- Sustainable gardening
References
- ^ nss abstracts
- ^ a b c d Companion Planting
- ^ a b c Bomford, Michael. "Yield, pest density, and tomato flavor effects of companion planting in garden-scale studies incorporating tomato, basil, and Brussels sprout". Organic eprints. Retrieved 5/2/2012.
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: Check date values in:|accessdate=
(help) - ^ "Fruit Tree Companion Planting". small-farm-permaculture-and-sustainable-living.com.
- Sally Jean Cunnigham (1998). "Great Garden Companions", ISBN 0-87596-847-3
- The Rodale Herb Book, Eighth Printing, c1974, ISBN 0-87857-076-4
- Companion Planting Guide, Ute Bohnsack [2]
- Companion Planting
- Companion plants by Professor Stuart B. Hill Department of Entomology Macdonald College
- DGS Gardening companion plant list
- Cass County Extension Companion Planting List
- [3]