What Are the Best Companion Plants for Parsley?
Parsley grows best with tomatoes, basil, chives and asparagus. 4 plants in our chart pair well with parsley, mostly by using space and time efficiently and attracting pollinators and beneficial insects; 1 of those pairings is research-supported.
| Plant | Why | Evidence |
|---|---|---|
| TomatoesPollinators & beneficials | Flowering parsley provides nectar for hoverflies and tiny parasitic wasps that attack aphids and caterpillars on tomatoes; parsley flowers in its second year. | Research-supported |
| BasilSpace & timing | Basil and parsley both want moist, fertile soil and regular cutting, so they share a pot or bed edge well. | Practical |
| ChivesSpace & timing | Parsley and chives both like moist, fertile soil and regular cutting, and fit together at a bed edge or in a pot. | Practical |
| AsparagusSpace & timing | Parsley grows under asparagus ferns without disturbing the crowns; the two are a traditional pairing. | Traditional |
Good companion plants for parsley, strongest evidence first.
What Should You Not Plant With Parsley?
Don't plant parsley near carrots and mint. The conflicts come mainly from shared pests and diseases and competition for space, light or water; 1 of the 2 is research-supported and the rest are practical or traditional rules.
| Plant | Why | Evidence |
|---|---|---|
| CarrotsShared pests & disease | Parsley is a host of the carrot rust fly, so a parsley patch next to carrots can keep the pest close; cover both with netting or grow them apart. | Research-supported |
| MintCompetition | Mint runners overrun parsley within a season in a shared pot or bed. | Practical |
Plants to keep away from parsley.
Which Parsley Companion Claims Are Backed by Research?
2 of the 6 parsley pairings in our data are research-supported: tomatoes and carrots. Of the rest, 3 rest on practical horticulture and 1 is a traditional claim.
Research-supported pairings rest on documented biology: shared pathogens, pollination, nematode suppression or insects that feed on specific flowers. Practical pairings are plain logic about space, shade and timing. Traditional companions such as asparagus are harmless to grow with parsley, but don't rely on them for pest control — row covers, crop rotation and regular checks do more.
How Should You Plant Parsley With Companions?
Plant parsley 8 to 10 inches (20–25 cm) apart at the edges of tomato or asparagus beds, or in a pot with basil and chives. Let a few plants overwinter and flower the second spring.
Companions still need room of their own, so work out how many parsley and partner plants fit in a bed with the plant spacing calculator. Planting dates for parsley and its companions follow your local spring and fall frost dates, so cool-season partners can be sown together in early spring or late summer for a fall crop.
Which Crops Share Companions With Parsley?
Cilantro, basil and chives share companion plants or growing conditions with parsley, so their companion guides help plan the same bed or rotation.
- The guide to companion plants for cilantro covers a crop grown in similar conditions; as members of the same plant family, the two should rotate together.
- The guide to companion plants for basil overlaps with this one: both crops grow well with tomatoes, chives and asparagus, and basil is a good companion for parsley too.
- The guide to companion plants for chives overlaps with this one: both crops grow well with tomatoes and basil, and chives are a good companion for parsley too.
To check parsley against every other plant at once, or test a whole bed plan, use the companion planting chart and garden checker.
Frequently Asked Questions
- What is the best companion plant for parsley?
- Tomatoes are one of the best-supported companions for parsley. Flowering parsley provides nectar for hoverflies and tiny parasitic wasps that attack aphids and caterpillars on tomatoes; parsley flowers in its second year.
- What should you not plant with parsley?
- Avoid planting parsley near carrots and mint. The most important conflict is with carrots: Parsley is a host of the carrot rust fly, so a parsley patch next to carrots can keep the pest close; cover both with netting or grow them apart.
- Can you plant parsley and cilantro together?
- Yes, parsley and cilantro can share a bed; neither is known to help or harm the other. Both belong to the carrot family (Apiaceae), so they share pests and diseases — rotate them together and don't follow one with the other.
- Does companion planting really work for parsley?
- Partly. 2 of the 6 parsley pairings in our data are backed by research, 3 are practical space or timing rules, and 1 is traditional. Flowers that feed beneficial insects and separating crops that share diseases have the strongest evidence.
Companion data: PlantoScan's own editorial compilation, written from general horticultural knowledge, plant pathology and published intercropping research. Evidence labels are our editorial judgment; results vary with climate, soil, variety and pest pressure.