Best Companion Herbs to Grow Together (and What to Avoid)

Growing herbs together can be a smart way to save space, improve plant health, and even enhance flavor and pest resistance. But not all herbs play well with others. Understanding which herbs thrive together and which combinations to avoid can make a huge difference in the success of your herb garden — whether it’s on a balcony, windowsill, or in raised garden beds.

Herbs that share similar needs in terms of sunlight, water, and soil conditions often make great companions. These plants can benefit each other by deterring pests, attracting beneficial insects, and even improving flavor when grown side by side. But mixing herbs with conflicting growth habits or environmental needs can lead to competition, stunted growth, or disease.

Herbs That Grow Well Together

Basil and parsley are excellent companions. Both prefer moist, rich soil and regular watering. They do well in partially shaded or sunny locations, making them a great pair in the same container or bed. Basil also helps deter aphids and whiteflies, offering some natural protection to its companions.

Thyme, rosemary, sage, and oregano make up a classic Mediterranean group. These herbs all prefer drier soil, full sun, and good drainage. Their compact growth and similar needs make them perfect companions, especially in a clay pot or sandy soil mix. Since they don’t like being waterlogged, grouping them ensures you're not overwatering one while trying to satisfy another.

Cilantro and chives can also work well together. Both enjoy slightly cooler temperatures and moist soil. They're a good match during spring and fall seasons or in areas with mild summers. Chives help repel certain insect pests, which can benefit cilantro during its early growth stages.

Mint deserves a special mention. While it's not ideal for planting with others in the same pot due to its aggressive root system, it can still serve as a beneficial companion nearby — especially when grown in its own container near pest-sensitive plants. Mint repels aphids, ants, and even rodents, making it a useful natural barrier herb.

Combinations to Avoid

While some herbs are friendly neighbors, others can quickly become problematic. For example, basil and rosemary do not make good companions. Basil likes moist soil, while rosemary thrives in drier conditions. Trying to meet the needs of both in the same container often means one will suffer.

Dill and cilantro may seem compatible at first, but they tend to bolt quickly when planted together. They compete for space and nutrients, and since both are short-lived annuals with similar habits, one can easily overshadow the other.

Avoid planting mint with any other herb in the same container. Its fast-spreading roots can take over the space and suffocate slower-growing herbs. If you do want to keep it close, make sure it’s planted in a separate pot, even if placed within the same planter or bed.

Fennel, though technically an herb, is often best kept isolated. It tends to inhibit the growth of most other plants around it, including herbs. It's known for releasing compounds into the soil that can stunt nearby herbs like basil, cilantro, and parsley.

Final Thoughts

Companion planting with herbs isn’t just about what looks good together — it’s about matching water, light, and soil preferences. By grouping herbs that share environmental needs and giving space to aggressive growers, you’ll cultivate a healthier, more productive garden with less effort and fewer pest problems.