Can you plant tomatoes and asparagus together?

Charts say yes. Nobody has tested tomatoes with asparagus, as far as we could find.

Why we can't give a firm answer

Garden charts recommend it. 4 garden chart entries recommend growing them together. 3 of them cite no source. Charts pass on gardening tradition; they are not tests.
Companion planting: Myth or reality? (2010 · Utah Pests News)

What to plant with tomatoes and asparagus

Good neighbours of both, best tested first.

BasilWith tomatoes: 7% more harvestWith asparagus: Recommended by garden charts, not tested
CilantroWith tomatoes: Less diseaseWith asparagus: Recommended by garden charts, not tested
ParsleyRecommended by garden charts for both, not tested yet

How each one was tested, with the evidence

What to keep away from tomatoes and asparagus

RosemaryWith tomatoes: Garden charts advise against it, not tested
PotatoWith asparagus: Garden charts advise against it, not tested
OnionWith asparagus: Garden charts advise against it, not tested
GarlicWith asparagus: 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

4 chart entries: 4 recommend, 0 advise against.

1 cited, 3 uncited.

Research

No papers found on this pair.

Yield trial

No intercropping yield trial.

Untested folklore

Companion plants for both tomatoes and asparagus

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

Plant	With tomatoes	With asparagus
Basil	Helpful plant chemistry, fewer pests and better soil and nutrient uptake7% more harvest from the same spaceField trial, 6 studies. Charts: recommend.Evidence for tomatoes and basil	No trial foundNot tested. Charts: recommend.Evidence for asparagus and basil
Cilantro	Less disease and fewer pestsField trial, 3 studies. Charts: recommend.Evidence for tomatoes and cilantro	No trial foundNot tested. Charts: recommend.Evidence for asparagus and cilantro

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

Parsley

The evidence, with sources

TraditionGood4 entries

GoodAsparagus helps Tomato
Asparagus: helps Tomatoes
List of companion plants (uncited entry) (Wikipedia)
GoodTomato helps Asparagus
Asparagus: helped by tomatoes
Companion planting: Myth or reality? (2010 · Utah Pests News)
GoodTomato helps Asparagus
Tomatoes: helps asparagus
List of companion plants (uncited entry) (Wikipedia)
GoodAsparagus helps Tomato
Tomatoes: helped by Asparagus
List of companion plants (uncited entry) (Wikipedia)

Plan a bed with tomatoes and asparagus

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

Have you grown tomatoes and asparagus 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.