Can you plant broccoli and tomatoes together?

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

Why we can't give a firm answer

Garden charts recommend it. 1 garden chart entry recommends growing them together. Charts pass on gardening tradition; they are not tests.
Lepidopteran pest populations and crop yields in row intercropped broccoli (Hooks · 2002 · Agricultural and Forest Entomology)

What to plant with broccoli and tomatoes

Good neighbours of both, best tested first.

CabbageWith broccoli: Lures pests awayWith tomatoes: 34% more harvest
OnionWith broccoli: Recommended by garden charts, not testedWith tomatoes: Better soil and nutrient uptake
ChivesWith broccoli: Recommended by garden charts, not testedWith tomatoes: Fewer pests

How each one was tested, with the evidence

What to keep away from broccoli and tomatoes

RosemaryWith tomatoes: 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.

All entries cite a source.

Research

No papers found on this pair.

Yield trial

No intercropping yield trial.

Untested folklore

Companion plants for both broccoli and tomatoes

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

Plant	With broccoli	With tomatoes
Cabbage	Lures pests awaySame family (Brassicaceae): shares pests and diseasesField trial, 3 studies. Charts: not listed.Evidence for broccoli and cabbage	34% more harvest from the same spaceField trial, 4 studies. Charts: not listed.Evidence for tomatoes and cabbage
Onion	No trial foundNot tested. Charts: recommend.Evidence for broccoli and onions	Better soil and nutrient uptake and bigger combined harvestMixed results on soil and nutrientsField trial, 7 studies. Charts: not listed.Evidence for tomatoes and onions
Chives	No trial foundNot tested. Charts: recommend.Evidence for broccoli and chives	Fewer pests and less diseaseField trial, 2 studies. Charts: recommend.Evidence for tomatoes and chives

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

TraditionGood1 entry

GoodTomato helps Broccoli
Broccoli: helped by tomato
Lepidopteran pest populations and crop yields in row intercropped broccoli (Hooks · 2002 · Agricultural and Forest Entomology)

Plan a bed with broccoli and tomatoes

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

Have you grown broccoli and tomatoes 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.