Tradition
Good
avoidgood
2 chart entries: 2 recommend, 0 advise against.
0 cited, 2 uncited.
Dill
Anethum graveolens
Apiaceae
Onion
Allium cepa
AmaryllidaceaeCan you plant dill and onions together?
Yes. Dill and onions grow well together. Growing them together drew in pest-eating insects in a field trial. That rests on a single study, so treat it as a lead, not a rule.
Why dill and onions work together
Draws in pest-eating insects. In a field trial, growing them together drew in pest-eating insects.
Management of Flea Beetles Using Ecological Engineering in Vegetable Agroecosystem of Kashmir (Maqsood S · 2024 · Research Square)Garden charts recommend it. 2 garden chart entries recommend growing them together. None of them cites a source. Charts pass on gardening tradition; they are not tests.
List of companion plants (uncited entry) (Wikipedia)
What to plant with dill and onions
Good neighbours of both, best tested first.
CabbageWith dill: 55% more harvestWith onions: 8% more harvest
PepperWith dill: Draws in pest-eating insectsWith onions: 20% more harvest
CucumberWith dill: Recommended by garden charts, not testedWith onions: Helpful plant chemistry
LettuceRecommended by garden charts for both, not tested yet
BroccoliRecommended by garden charts for both, not tested yet
What to keep away from dill and onions
The evidence in detail
For readers who want to dig in: every chart entry, study and yield trial behind the answer above, with the numbers.
Tradition, research and yield trials
Research
Good
avoidgood
1 paper found: 1 positive, 0 negative.
natural enemies
auto-classified not reviewed by a person
Yield trial
No intercropping yield trial.
Good neighbours
What happens above and below ground
Each animation illustrates a mechanism a study reported for this pair. Pick a card to focus on it.
Everything at once.
Companion plants for both dill and onions
Plants that are good neighbours of each. Biggest harvest gain first; each cell links to the evidence for that pair.
| Plant | With dill | With onions |
|---|---|---|
| Cabbage | Draws in pest-eating insects and lures pests away55% more harvest from the same spaceField trial, 3 studies. Charts: recommend.Evidence for dill and cabbage | Fewer pests and draws in pest-eating insects8% more harvest from the same spaceField trial, 8 studies. Charts: recommend.Evidence for onions and cabbage |
| Pepper | Draws in pest-eating insectsField trial, 1 study. Charts: not listed.Evidence for dill and peppers | 20% more harvest from the same spaceField trial, 6 studies. Charts: recommend.Evidence for onions and peppers |
| Cucumber | No trial foundNot tested. Charts: recommend.Evidence for dill and cucumbers | Helpful plant chemistry and bigger combined harvestField trial, 3 studies. Charts: recommend.Evidence for onions and cucumbers |
Harvest from the same space compares a bed with both crops against the same area split into single-crop beds, counting the harvest of both crops (the land equivalent ratio in yield trials).
Recommended by garden charts for both, not tested yet
The evidence, with sources
- Goodnatural enemiesfield trialauto-classifiedManagement of Flea Beetles Using Ecological Engineering in Vegetable Agroecosystem of KashmirManagement of Flea Beetles Using Ecological Engineering in Vegetable Agroecosystem of Kashmir (Maqsood S · 2024 · Research Square)Relevance 83% · effect confidence 57%
- GoodDill helps OnionOnion: helped by dillList of companion plants (uncited entry) (Wikipedia)
- GoodDill helps OnionDill: helps onionsList of companion plants (uncited entry) (Wikipedia)
All neighbours of dill and of onion, or every pair at once in the companion planting chart.
Have you grown dill and onions together?
Tell other gardeners what happened: spacing, pests, harvest, or ask a question. Reader notes are not checked by us and do not change the verdicts on this page.