Carrot
Companion plants for carrots
The best companion plants for carrots are parsley, lettuce, corn, peppers and cabbage. Peas, parsnips and dill are best kept away. Of the 22 plants we have data on, 12 are good neighbours, 5 are bad ones and 2 are contested. 9 of these verdicts rest on field trials or research papers; the rest come from traditional companion-planting charts.
- 12 good
- 5 to avoid
- 2 contested
- 9 tested in trials or papers
Neighbours of carrots at a glance
Inner rings are backed by trials or papers, outer rings by charts only. Pick a plant to see its sources.
The interactive map needs JavaScript. Every plant on it is listed below with its evidence.
Good companion plants for carrots
Biggest harvest gain first, then the plants tested without a yield count. Each row links to the full evidence for the pair.
| Plant | What trials found with carrots | Tested by | Garden charts |
|---|---|---|---|
 Parsley |
137% more harvest from the same spaceSame family (Apiaceae): shares pests and diseases | Field trial1 study | Not listed |
 Pepper |
127% more harvest from the same space | Field trial1 study | Not listed |
 Lettuce |
78% more harvest from the same space | Field trial1 study | Recommend |
 Sweet corn |
50% more harvest from the same space | Field trial2 studies | Not listed |
 Cabbage |
19% more harvest from the same space | Field trial1 study | Not listed |
 Fava bean |
Bigger combined harvest | Field trial1 study | Not listed |
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, not tested yet
We found no trial or paper on these pairs with carrots. They may still work; nobody has measured it.
What not to plant with carrots
| Plant | What trials found with carrots | Tested by | Garden charts |
|---|---|---|---|
 Pea |
Smaller combined harvest | Greenhouse or pot trial1 study | Not listed |
 Parsnip |
No trial foundSame family (Apiaceae): shares pests and diseases | Not tested | Advise against |
 Dill |
No trial foundSame family (Apiaceae): shares pests and diseases | Not tested | Advise against |
 Potato |
No trial found | Not tested | Advise against |
 Radish |
No trial found | Not tested | Advise against |
Relatives that share pests and diseases
| Plant | What trials found with carrots | Tested by | Garden charts |
|---|---|---|---|
 Celery |
No trial foundSame family (Apiaceae): shares pests and diseases | Not tested | Not listed |
 Fennel |
No trial foundSame family (Apiaceae): shares pests and diseases | Not tested | Not listed |
 Cilantro |
No trial foundSame family (Apiaceae): shares pests and diseases | Not tested | Not listed |
Contested pairings
The sources disagree, or the charts say one thing and the trials another. Open a pair before you plant it.
| Plant | What trials found with carrots | Tested by | Garden charts |
|---|---|---|---|
 Onion |
Fewer pestsMixed results on pests | Field trial2 studies | Recommend |
 Tomato |
Mixed results on harvest | Greenhouse or pot trial1 study | Recommend |
Sources
15 sources behind the verdicts on this page. 16 chart entries cite no source and are marked as tradition only.
Show all 15 sources
Same family (Apiaceae): Parsnip, Celery, Parsley, Dill, Fennel, Cilantro.
What grows well with your carrots?
Share what worked next to your carrots and what did not, or ask other growers a question. Reader notes are not checked by us and do not change the verdicts on this page.