Can you plant kohlrabi and lettuce together?

Charts say yes. Nobody has tested kohlrabi 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 recommend it. 1 garden chart entry recommends growing them together. It cites no source. Charts pass on gardening tradition; they are not tests.
List of companion plants (uncited entry) (Wikipedia)

What to plant with kohlrabi and lettuce

Good neighbours of both, best tested first.

BeetWith kohlrabi: Recommended by garden charts, not testedWith lettuce: 58% more harvest
CucumberWith kohlrabi: Recommended by garden charts, not testedWith lettuce: 35% more harvest
OnionRecommended by garden charts for both, not tested yet

How each one was tested, with the evidence

What to keep away from kohlrabi and lettuce

BeanWith kohlrabi: Garden charts advise against it, not tested
CeleryWith lettuce: 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

Good

avoidgood

1 chart entry: 1 recommend, 0 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 kohlrabi and lettuce

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

Plant	With kohlrabi	With lettuce
Beet	No trial foundNot tested. Charts: recommend.Evidence for kohlrabi and beets	58% more harvest from the same spaceField trial, 1 study. Charts: recommend.Evidence for lettuce and beets
Cucumber	No trial foundNot tested. Charts: recommend.Evidence for kohlrabi 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

Onion

The evidence, with sources

TraditionGood1 entry

GoodKohlrabi helps Lettuce
Lettuce: helped by kohlrabi
List of companion plants (uncited entry) (Wikipedia)

Plan a bed with kohlrabi and lettuce

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

Have you grown kohlrabi 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.