Can you plant celery and lettuce together?

Charts say no. Nobody has tested celery with lettuce, as far as we could find. The chart entry we found cites no source.

Why we can't give a firm answer

Garden charts advise against it. 1 garden chart entry says to keep them apart. It cites no source. Charts pass on gardening tradition; they are not tests.
List of companion plants (uncited entry) (Wikipedia)

What to plant with celery and lettuce

Good neighbours of both, best tested first.

BeanWith celery: Recommended by garden charts, not testedWith lettuce: 48% more harvest
CucumberWith celery: Fewer pestsWith lettuce: 35% more harvest
GarlicRecommended by garden charts for both, not tested yet

How each one was tested, with the evidence

What to keep away from celery and lettuce

Sweet cornWith celery: Garden charts advise against it, not tested
ParsleyWith lettuce: 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

Tradition

Bad

avoidgood

1 chart entry: 0 recommend, 1 advise against.

0 cited, 1 uncited.

Research

No papers found on this pair.

Yield trial

No intercropping yield trial.

Untested folklore

Companion plants for both celery and lettuce

Plants that are good neighbours of each. Biggest harvest gain first; each cell links to the evidence for that pair.

Plant	With celery	With lettuce
Bean	No trial foundNot tested. Charts: recommend.Evidence for celery and beans	48% more harvest from the same spaceField trial, 2 studies. Charts: recommend.Evidence for lettuce and beans
Cucumber	Fewer pestsField trial, 2 studies. Charts: recommend.Evidence for celery and cucumbers	Fewer pests35% more harvest from the same spaceField trial, 5 studies. Charts: recommend.Evidence for lettuce 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

Garlic

The evidence, with sources

TraditionBad1 entry

Badadvises against
Lettuce: avoid Celery
List of companion plants (uncited entry) (Wikipedia)

Plan a bed with celery and lettuce

All neighbours of celery and of lettuce, or every pair at once in the companion planting chart.

Have you grown celery and lettuce 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.