Tradition
No chart mentions this pair.
Sweet corn
Zea mays
Poaceae
Leek
Allium ampeloprasum var. porrum
AmaryllidaceaeCan you plant corn and leeks together?
It depends. The sources disagree about corn and leeks. Results on pests were mixed in a field trial.
Why it depends
Mixed results on pests. In a field trial, results on pests were mixed.
The Compromise of Intercropping: Biological Pest Control Versus Competition by Crop Species (Santillano-C??zares J · 2019 · Southwestern Entomologist)
What to plant with corn and leeks
Good neighbours of both, best tested first.
CarrotWith corn: 50% more harvestWith leeks: Recommended by garden charts, not tested
What to keep away from corn and leeks
CeleryWith corn: Garden charts advise against it, not tested
Swiss chardWith leeks: Garden charts advise against it, not tested
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
Mixed
avoidgood
1 paper found: 0 positive, 0 negative, 1 mixed.
pest suppression
auto-classified not reviewed by a person
Yield trial
No intercropping yield trial.
It's complicated
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 corn and leeks
Plants that are good neighbours of each. Biggest harvest gain first; each cell links to the evidence for that pair.
| Plant | With corn | With leeks |
|---|---|---|
| Carrot | 50% more harvest from the same spaceField trial, 2 studies. Charts: not listed.Evidence for corn and carrots | No trial foundNot tested. Charts: recommend.Evidence for leeks and carrots |
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).
The evidence, with sources
- Mixedpest suppressionfield trialauto-classifiedThe Compromise of Intercropping: Biological Pest Control Versus Competition by Crop SpeciesThe Compromise of Intercropping: Biological Pest Control Versus Competition by Crop Species (Santillano-C??zares J · 2019 · Southwestern Entomologist)Relevance 92% · effect confidence 89%
All neighbours of sweet corn and of leek, or every pair at once in the companion planting chart.
Have you grown corn and leeks 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.