Daucus carotaDaucus carotarepels pests
Strong aromatics like basil, garlic, and marigold mask the olfactory cues that pests use to find their target crop.
Ce să plantezi cu Allium cepa
Allium cepa
Allium cepa grows best when paired with plants that repels pests. We've catalogued 6 beneficial companions and 2 antagonists to avoid. Every pairing below cites its mechanism — pest deterrence, nitrogen fixing, allelopathy, or shared disease.
Want the full profile? See Allium cepa botanical profile →
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I
Plantează lângă acestea pentru o creștere mai bună
6 plantsSpinachSpinacia oleracearepels pests
Onions fit between spinach rows and help confuse aphids.
StrawberryFragaria × ananassarepels pests
Strong aromatics like basil, garlic, and marigold mask the olfactory cues that pests use to find their target crop.
Daucus carotaDaucus carotarepels pests
Onion deters carrot fly; carrot deters onion fly.
Lactuca sativaLactuca sativarepels pests
Onions help deter aphids and make efficient use of vertical space with lettuce.
Wild CabbageBrassica oleracearepels pests
Strong aromatics like basil, garlic, and marigold mask the olfactory cues that pests use to find their target crop.
II
Ține departe de acestea se luptă
2 plantsPotatoSolanum tuberosumcompetes for resources
Onions and potatoes are commonly separated in traditional companion charts.
PeaPisum sativuminhibits growth
Roots or leaves release chemicals that suppress neighbouring plants. Often a one-way problem (walnut → most vegetables).
IV
Cum funcționează mecanismele în grădină
pest repellent
Strong aromatics like basil, garlic, and marigold mask the olfactory cues that pests use to find their target crop.
V
Întrebări frecvente
What are the best companion plants for Allium cepa?
The top companions are Daucus carota, Spinach, Strawberry. 3 more pairings are catalogued above with their mechanisms.
What should I NOT plant near Allium cepa?
Avoid Potato, Pea. Reasons vary — allelopathy, shared pests, or resource competition. See the section above for each plant's specific issue.
Can companion planting reduce pest damage on Allium cepa?
Aromatic companions deter many pests through scent masking and alarm pheromones. Effect varies by pest species and density — most effective as part of a polyculture, not a one-plant solution.
Is companion planting scientifically proven?
Some mechanisms are well-documented (legume nitrogen fixation, allelopathy in walnut and fennel, nematode suppression by marigolds). Others are traditional pairings with anecdotal support. We cite both, but mark mechanism strength where available.
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