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Onions are a gemstone to grow in your garden . They make good friends with a flock of other craw and enhance the flavor of others . Plus , they facilitate keep pests away . If you ’re looking to do a petty companion planting this class , you ca n’t go unseasonable with onion .
Onions are comfortable to grow and they ’re a cash harvest . merge that with the fact onions are super - useful in the kitchen , and you ca n’t go untimely with planting as many as will fit in your garden .
So , if you want to make the ripe of your onion crop by embracing companion planting , let ’s look at what to embed with them , and a few to avoid .
Best Companion Plants for Onions
Onions need full sun and do n’t like being shaded by other plants . The soil pH should be between 6 and 7 , and well - draining . Wet soil will moulder onions . They grow well in temperature ranging from 55ºF to 75ºF.
Here are some of the well plants to portion out infinite with onions .
1. Carrots
onion benefitcarrots(Daucus carota subsp . sativus ) because they help to repel the Daucus carota sativa tent flap . If you have a spot of Daucus carota sativa growing , wall them with onion plant . The onions act as a border , repelling the carrot fly , which hates the tone of onion .
You could also have alternate course of cultivated carrot and onions .
2. Beets
Allium cepa are a great deterrent to many pests , so it make sense to environ them with pest - prone plants likebeets(Beta vulgaris ) , which involve protection . Some aphids and sugar common beet beetles do n’t like onions thanks to the sulfur - like scent they let out .
If you have difficulty with rabbits , rabbit , and deer eating your beetroot leaves , plant plenty of Allium cepa around them . I wish to plant the common beet toward the midriff of the planting area , and then surround them with row of all type of onions .
Just check that you’re able to get to the beets when you need to .
3. Swiss Chard
Swiss chard(Beta vulgaris subsp . vulgaris ) can cater shade to the land to help keep it moist . Because it does n’t get too big , chard wo n’t foreclose sunshine from reaching the onion . A little wraith is good , but too much will hurt the onions .
Because onion are short rooted , they apprize moist ( but not soused ) soil . The companion planting of swiss chard helps with this .
Plant swiss chard among the onion rows , but keep the base about 12 inches from the cheeseparing onions . You could implant the swiss chard behind the onions if the garden face the afternoon sun .
4. Leeks
It ’s often advisable to not embed standardised plants from the same family together due to the pests and disease they may attract . Leeks(Allium ampeloprasum ) and onions are a distich made in heaven though . They both have similar grease , temperature , and nutrient needs .
Leeks are a valuable arm for Allium cepa as well . When the Allium cepa fly come looking for the onions , they get confused by the leek odour . Plant alternating row of leeks and onion , or rows of onions and row of scallion next to them .
5. Summer Savory
Some companion plantings do n’t proffer trade protection , but rather an advance in timber and quantity . Summer savory(Satureja hortensis ) cause Allium cepa slightly sweet and meliorate their size as well .
Because summer savory can grow up to two feet grandiloquent , be wary of the shade issue . plant life onion in front face the sun . Water both well , but do n’t saturate the soil .
6. Brassicas
The whole menage ofBrassicagenus benefit from being companion plant with onions . These include :
Just void establish Brassica rapa near onion . They can regard the flavour of the turnip .
Brassica is always inundated by pests but can be protect by Allium cepa . The smell of onion repels many of the pestis attract to brassicas . This can save you a large amount of spraying and treating .
7. Lettuce
Lettuce ( Lactuca sativa ) is a swiftly growing craw compare to onions . Sow the lettuce seeds while the onions are still pocket-size . You ’ll be able-bodied to glean the dinero , and then give the onion electric-light bulb time and room to farm .
Allium cepa will also repel many of the pests that plague lucre like poke , snails , and aphids .
8. Strawberries
This is n’t a coarse combining because you may mean the onions will affect the sweet feeling ofstrawberries(Fragaria × ananassa ) . This is n’t the case , but onion will prevent many pests assort with hemangioma simplex .
Plant rows of hemangioma simplex on the side of the onion patch , keep about 12 inch spacing from each other .
9. Chamomile
Not only ischamomile(Matricaria recutitaandAnthemis nobilis ) a great industrial plant to grow for herbal remedies and afternoon tea , but it also improves the taste of onion when grown close together .
Chamomile seems to grow really well when planted in the onion garden . Plus , when the weather is humid , chamomile ’s antifungal property can help onion avoid fungal diseases .
10. Peppers (Hot and Sweet)
Onions protectpepperplants by rebuff many of the pests that love them . Aphids and cutworms love the young peppercorn plants but do n’t like onions . flora pepper within 12 to 18 in of row of onion .
11. Melons
Pests that are attracted to melons are repelled by Allium cepa . These admit melon vine aphids and wanderer touch . Most melons beseem being planted with onion as long as the melon vine vine does n’t give chase directly through the onion plant run-in . They will likely stifle the onions from light and moisture and may damage them with their fruit . strain these melons :
12. Radish
I ’m fairly sure thatradishes(Raphanus raphanistrum subsp . sativus ) are friends with everyone in the garden . They rise so quickly that they can be planted in among just about everything , onions included .
Plant radishes in between rows of onions and even in between onion within the row .
There ’s no huge benefit to either onions or radishes with this comrade planting combination , but the timing suits both crop . Radishes grow quickly and will be long go before you even think about harvesting the Allium cepa .
You may even get two planting of radishes , but be careful not to upset the onion plant bulbs .
13. Parsnips
Parsnips(Pastinaca sativa)benefit from onion much as carrots do . They share space well because of the scent of the onions . Parsnips bear from the same pests as carrots do , but the onion repel them .
I have a few row of onions with carrots on one side and parsnips on the other . It works well .
14. Dill
Dill(Anethum graveolens ) grows well with onions without stimulate any issue . The bearing of dill helps with the flavor of onions and is a utile herbaceous plant in the kitchen , just like onions .
15. Borage
Borage(Borago officinalis ) pull in predatory wasps to the garden that attack many of the pests that destroy crop including onions .
This underappreciated plant life will also help protect those other plant in the garden you ’re using as associate plants . tailwort repels both cabbage worms and tomato louse .
16. Marigolds
Marigolds(Tagetes spp . ) are well known to gross out aphids and are suitable to be planted in the rows with the onions . you may also found marigolds around the Allium cepa rows as a roadblock , or on the edge of the garden .
17. Mint
Mint gives off such a inviolable smell for insects , onion plant flies in finical , that it flurry them .
Remember , mint will take over the garden wherever it ’s planted , so I paint a picture you found it in skunk that you may remove at the end of the growing time of year .
If you imbed tomatoes with onion plant , mint will serve them as well , so a good melodic theme is to pose the mint containers between both crops . Be on the outlook that the sight roots do n’t grow through the bottom of the container and into the ground .
4 Plants to Avoid Putting With Onions
Not everything play well with onions . Here are four plants to avoid .
1. Legumes
Onions and beans emphatically do n’t mix well . onion give off a chemical substance that kills good bacteria on the roots of beans . This will stunt their increase , or even kill the plant life .
With beans , include other legumes that do n’t act well with onions like :
Legumes fix the soil with N , so consider planting onion plant after you have legumes in an country of the garden . onion are big nitrogen feeders .
2. Sage
salvia is n’t high-risk for onions , but the conditions it requires are dissimilar . If you adjudicate to get matter right for the salvia , the onions will suffer , and the same for the sage if you attempt to get the growing conditions set for the onions .
The good thing to do is keep both industrial plant well break .
3. Asparagus
Onions andasparaguscompete for the same nutrient , so unless you are always in the garden monitor them , one will meet if not both .
Asparagus also takes a long time to get established and grow twelvemonth after year . You will disturb them if you reap the onions close to the Asparagus officinales .
4. Other Alliums (Except Leek)
Garlic and shallot are to be observe well away from onions . Onion maggots will move from onions to Allium sativum and Allium ascalonicum easy and you ’ll mislay all three crops .
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