Charts
Companion planting herb charts
The most reliable way to pair herbs is not by kitchen flavour but by growing conditions. Herbs that share the same water and light needs sit together happily; mismatched neighbours slowly stress each other. These charts group common herbs that way, and flag the ones better kept apart.
Group by water needs first
The single most useful sorting rule is moisture. Mediterranean herbs prefer to dry out between waterings, while soft-leaved herbs want steady moisture. Mixing the two in one bed or pot means one group is always uncomfortable.
| Group | Herbs | Preference |
|---|---|---|
| Mediterranean | Rosemary, thyme, sage, oregano, marjoram | Full sun, well-drained soil, drier between waterings. |
| Moisture-loving | Basil, parsley, cilantro, chives | Steady, consistent moisture. |
| Keep separate | Mint, lemon balm, fennel | Spread aggressively or suppress neighbours. |
Pairings that tend to work
- Rosemary, thyme, and sage share sun and dry feet, making a stable drought-tolerant trio for one pot or a hot, well-drained bed.
- Basil, parsley, and cilantro all want regular water and grow comfortably together while their watering needs stay in sync.
- Basil near tomatoes or peppers is a long-standing garden pairing that also suits the same warm, sunny conditions.
Herbs to keep apart
A few herbs are poor neighbours by nature rather than by preference:
- Mint and lemon balm spread by runners and will crowd out a shared container; give each its own pot or a root barrier.
- Fennel can inhibit the growth of nearby plants and is usually grown on its own, away from the rest of the herb bed.
- Dill and cilantro are best spaced apart, and dill can crowd basil.
A quick reference chart
| Plant | Good companion | Reason |
|---|---|---|
| Tomatoes | Basil | Shared warm, sunny conditions; classic garden pairing. |
| Sage | Thyme, rosemary, marjoram | All prefer dry, well-drained soil. |
| Cilantro | Successive small sowings | Bolts fast, so stagger plantings rather than crowding. |
| Mint | Its own container | Aggressive spreader; isolate the roots. |
Light counts too. After water, match sun exposure. Grouping herbs that share the same light keeps a mixed planting balanced rather than leaving shade-tolerant herbs scorched or sun-lovers stretched.