Tradition
Good
avoidgood
2 chart entries: 2 recommend, 0 advise against.
All entries cite a source.
Carrot
Daucus carota subsp. sativus
Apiaceae
Tomato
Solanum lycopersicum
SolanaceaeCan you plant carrots and tomatoes together?
It depends. The sources disagree about carrots and tomatoes. Results on harvest were mixed in a greenhouse or pot trial, while garden charts recommend it.
Why it depends
Mixed results on harvest. In a greenhouse or pot trial, results on harvest were mixed.
Intercropping on Mars: A promising system to optimise fresh food production in future martian colonies. (Gonçalves R · 2024 · PloS one)Garden charts recommend it. 2 garden chart entries recommend growing them together. Charts pass on gardening tradition; they are not tests.
Effect of intercropping of spices, cereal and root crops on the incidence of Helicoverpa armigera (Hub.) in tomato (Ram · 2010 · Vegetable Science)
What to plant with carrots and tomatoes
Good neighbours of both, best tested first.
ParsleyWith carrots: 137% more harvestWith tomatoes: Recommended by garden charts, not tested
CabbageWith carrots: 19% more harvestWith tomatoes: 34% more harvest
BeanWith carrots: Recommended by garden charts, not testedWith tomatoes: 18% more harvest
CucumberWith carrots: Recommended by garden charts, not testedWith tomatoes: 17% more harvest
ChivesWith carrots: Recommended by garden charts, not testedWith tomatoes: Fewer pests
What to keep away from carrots and tomatoes
PeaWith carrots: Smaller combined harvest
ParsnipWith carrots: Garden charts advise against it, not tested
DillWith carrots: Garden charts advise against it, not tested
PotatoWith carrots: Garden charts advise against it, not tested
RadishWith carrots: Garden charts advise against it, not tested
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
Research
Mixed
avoidgood
1 paper found: 0 positive, 0 negative, 1 mixed.
yield / land use
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 carrots and tomatoes
Plants that are good neighbours of each. Biggest harvest gain first; each cell links to the evidence for that pair.
| Plant | With carrots | With tomatoes |
|---|---|---|
| Parsley | 137% more harvest from the same spaceSame family (Apiaceae): shares pests and diseasesField trial, 1 study. Charts: not listed.Evidence for carrots and parsley | No trial foundNot tested. Charts: recommend.Evidence for tomatoes and parsley |
| Cabbage | 19% more harvest from the same spaceField trial, 1 study. Charts: not listed.Evidence for carrots and cabbage | 34% more harvest from the same spaceField trial, 4 studies. Charts: not listed.Evidence for tomatoes and cabbage |
| Bean | No trial foundNot tested. Charts: recommend.Evidence for carrots and beans | 18% more harvest from the same spaceField trial, 2 studies. Charts: recommend.Evidence for tomatoes and beans |
| Cucumber | No trial foundNot tested. Charts: recommend.Evidence for carrots and cucumbers | Lures pests away17% more harvest from the same spaceField trial, 4 studies. Charts: recommend.Evidence for tomatoes and cucumbers |
| Chives | No trial foundNot tested. Charts: recommend.Evidence for carrots and chives | Fewer pests and less diseaseField trial, 2 studies. Charts: recommend.Evidence for tomatoes and chives |
 Leek | No trial foundNot tested. Charts: recommend.Evidence for carrots and leeks | Less disease and better soil and nutrient uptakeGreenhouse or pot trial, 2 studies. Charts: recommend.Evidence for tomatoes and leeks |
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
The evidence, with sources
- Mixedyield / land usegreenhouse / pot trialauto-classifiedIntercropping on Mars: A promising system to optimise fresh food production in future martian colonies.Intercropping on Mars: A promising system to optimise fresh food production in future martian colonies. (Gonçalves R · 2024 · PloS one)Relevance 93% · effect confidence 56%
- GoodCarrot helps TomatoCarrots: helps TomatoesEffect of intercropping of spices, cereal and root crops on the incidence of Helicoverpa armigera (Hub.) in tomato (Ram · 2010 · Vegetable Science)
- GoodCarrot helps TomatoTomatoes: helped by carrotsEffect of intercropping of spices, cereal and root crops on the incidence of Helicoverpa armigera (Hub.) in tomato (Ram · 2010 · Vegetable Science)
All neighbours of carrot and of tomato, or every pair at once in the companion planting chart.
Have you grown carrots 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.