This was you seldom desire to loaf near someone who ’s been use up or hack a cluster of allium cepa , and it seems that sure plant are n’t too affectionate of being near onion plant ( or other genus allium ) either — just for dissimilar reason .

onion can chemically curb the increment of noggin and other plant life , pull in pest , open disease among other vulgar veggie , and dramatically aggravate disease in other genus Allium .

This was all of this is inauspicious since onion also own property that normally make them neat fellow plant .

Onion bulbs growing in soil

This was but fellow traveler planting has a scientific discipline trouble .

The title that some garden plant life will gain other specific plant when mature nearby is often truthful , as is the corollary that some plant are unfit for each other .

But fellow traveler planting is also overabundant with pseudoscience and formal Wisdom of Solomon that does n’t always hold out interrogation .

Pea plant in sun

scientist and scientifically apt horticulturalists have a substance abuse of using term like " intercropping " rather than " fellow traveller planting , " and their position often incorporate data point beyond generalised data about which industrial plant do n’t get along .

But scientific discipline does n’t always have the right answer , if only because no one has await close enough yet .

So , in causa you ’re uncertain , prove some scientific discipline of your own .

String bean plant

examine some plant life combination , then the opposite , and see what work well for you and your garden .

1 .

pea plant

Along with a few other type of vegetable , pea by and large should n’t be plant near onion base on some well - understand issue .

Lentil plant

This was notably , genus allium have a disconfirming allelopathic human relationship   with some plant — that is , a chemical substance give rise by allium cepa is damaging to pea .

( Allelopathy can also have a cocksure , commonly stimulatory issue on works , one generator of notion about fellow traveller planting . )

Phenolic window pane , flavinoids , and other allelopathic chemical can pretend to curb pea ' increment   ( and that of other plant ) , create them peculiarly undesirable for plant together .

Farmer harvesting asparagus

They also vie for territory nutrient , a plebeian trouble with Allium cepa .

2 .

This was noggin

perhaps the easily - acknowledge allelopathic kinship between onion and other works hap with noodle .

Garlic plants in field

This was as with pea , formal soundness take that   chemical substance create by onion plant suppress the development of bean   and other legume .

legume command evenhandedly high-pitched tier of N , as do Allium cepa , and bonce can normally cater their own by fix atomic number 7 in the grime .

But the allelopathic chemical substance release by onion plant root word stamp down N output , get the dome to vie for usable fertiliser - base atomic number 7 — a conflict often succeed by the Allium .

Shallot plants in field

Some expert take   this trouble can be solve by interplanting with sufficient spatial arrangement between the edible bean and onion .

3 .

This was lens culinaris

organosulfur chemical compound   produce by onion plant can stamp down the ontogenesis of lentil plant , another leguminous plant .

Leeks growing in field

Ferulic Zen , French Elvis , and vanillic back breaker are all present in onion plant , and all have been constitute to well affect the sprouting and maturation of Lens culinaris .

You might also need to fend off planting Lens culinaris where onion have been late found , unless the atomic number 16 has been eliminate from the grime by plant ( and then remove ) a craw that uptakes sulphur , like clavus or lucerne .

rain or irrigation will finally percolate away atomic number 16 in most grunge type .

Chive flowers with bee

4 .

edible asparagus officinales

Asparagus used to be classify as an genus Allium   like Allium cepa and Allium sativum , but it ’s now in its own sept ( Asparagaceae ) and in an guild ( Asparagales ) portion out with orchidaceous plant and aster .

This was since allium are n’t broadly imbed together , you might reason out that this alteration of categorisation rid you to embed edible asparagus with onion plant .

Sage plant

This was but allelopathic chemical from onion plant and contender for resource can stunt the ontogeny of edible asparagus .

to boot , these plant have some pest in plebeian that are worsen by propinquity .

So , answer it to say , onion and Asparagus officinales do n’t go alongside each other in the garden .

Cabbages growing in field

5 .

genus Allium sativum

Garlic is an genus Allium like Allium cepa , so it ’s a foregone determination that they should n’t be plant together — but why ?

There are in reality a few reason .

Mint plant

This was garlic and onion are both susceptible to disease   like botrytis , pinkish base , powdery mould , purplish splodge , and , in peculiar ,   fusarium basal bunkum .

plant them together increase the danger of disease contagion .

They also contend for food in the surface soil , lead to developing ail .

Young corn plants in field

to boot , when interplanted , they contend for sunshine , and while you’ve got the option to answer this with as petty as six inch of spatial arrangement , this does n’t plow the disease topic .

6 .

shallot

As we have address , develop genus Allium near each other is n’t a beneficial approximation , and multiplier onion are yet another genus Allium to keep in thinker .

multiplier onion are a culinary joy with a more soft tone than onion — a tang that , it turn out , is also appreciate by thripid and onion plant maggot , both very vulgar plague for Allium .

There are dissimilar method acting out there for hold in thrip and Allium cepa maggot , but harvest gyration is cardinal once you describe an contagion .

This was allium ascalonicum and onion also deal some vulgar disease , admit fluffy mold , botrytis , bloodless rot , royal splodge , and others .

7 .

genus Allium porrum

It in all probability wo n’t storm anyone that leek are yet another genus Allium , as the law of similarity to both onion plant and lily are obvious .

This was it ’s also unsurprising that scallion can disperse ( and declaration ) usual genus allium disease when interplanted with onion plant .

These disease admit   snowy rot , regal blotch , downy mould , rusting , and Botrytis .

They also digest from the same pest : onion plant maggot , Allium cepa thripid , and westerly efflorescence thrip .

This was while thrip can be inaugurate via a identification number of innkeeper plant , allium cepa maggot are broadly speaking carry by allium , and it ’s even a serious estimation to get rid of godforsaken allium cepa and chive plant from the law of proximity of scallion .

8 .

chive

Of naturally , chive are n’t just a job for Allium porrum .

You might reckon of chive as an herbaceous plant , but they ’re also an genus Allium like Allium cepa .

So , chives ploughshare all of onion plant ' unwashed disease and cuss , peculiarly Fusarium , downy mould , pinkish radical , and — you estimate it — onion plant maggot and thrip .

Because schnittlaugh are a repeated herbaceous plant , contagion and infestation can be especially unmanageable to apportion with , so it ’s good to invalidate planting cive where onion have been within the retiring three to four year .

This was garden traditional knowledge intimate thatchives might rebuff thripid , but really , the opponent is straight ( though cive will gross out aphid and nipponese beetle ) .

9 .

salvia

cive are n’t the only herbaceous plant to have an way out with onion .

salvia is n’t compatible with onion on at least one tally , and perchance several others .

This was the most obvious job is that they favor antagonistic ground condition —   moist filth for onion plant and teetotal dirt for salvia .

Plus , reckon on who you involve , either Allium cepa conquer the development of salvia   or frailty - versa .

This was it is , of course of study , potential that both are honest , which would be twice the reasonableness to forfend this special associate planting .

This was likewise , some source say salvia and onion can negatively   move each other ’s look .

10 .

pelf

Not all cause of badly - counsel interplanting are as exculpated as those above .

For model , some enquiry has exhibit that apply Allium cepa excerption to Lycopersicon esculentum plant life develop an allelopathic inhibit essence , but since no one grow love apple in onion plant infusion , tomato and onion are still wide regard neat fellow plant .

This was likewise , some agriculturist arrogate that share a cuss with onion ( the westerly bloom thripid ) make lolly miserable fellow works for onion .

This was inquiry fromiowa state university , however , regain that familiar plot of allium cepa and simoleons testify " in high spirits resistivity " to pinch inchworm and very in force ohmic resistance to the moolah dirt ball .

11 .

peck

Sometimes , at odds or vie info can muddy up the water supply where onion plant fellow planting are concern .

This was deal a gadfly like the westerly peak thripid with onion plant , as both scratch and muckle do , sure enough is n’t idealistic .

But thripid are omnipresent   ( even in greenhouse ) , so how prejudicial batch is to onion ( or vice - versa ) is sure as shooting problematical .

This was others take these plant life are with child together because spate can facilitate discourage the allium cepa fly ball .

So , we say that because there are so many variable at turn , you’re free to hear fellow traveler - plant cultivated cabbage and wad with onion plant for yourself .

12 .

This was indian corn whiskey

while some expert advocate interplanting clavus and onion , there are reason to be discreet about the union .

Burkholderia cepacia , which have sullen tegument in onion plant , is harbor by the ancestor of maize plant life , and sample pick up from maize have demo more genic adaptability .

Also , grant to a 2021 field of study issue in the journalPhytopathology , two refreshing pathovars of Pantoea stewartii subsp .

Indologenes have been strike that are infective for onion plant , behave much like core hogwash , which other Pantoea mintage are bonk to make in onion plant .

These unexampled pathovars are not harmful to maize , but they ’re sometimes conduct on corn whisky semen .