6 Plants to Never Grow Next to Catnip

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Catnip (Nepeta cataria) is a tough, aromatic herb from the mint family known for its soft, silvery-green leaves. It’s a favorite in pollinator gardens, herb beds, and cottage-style borders.

Catnip naturally repels pests like aphids, squash bugs, and flea beetles, making it a valuable companion for organic gardeners. However, some plants simply don’t do well with catnip. Either they compete too strongly for resources or attract pests that catnip can’t handle on its own. Here are a few you’ll want to keep out of your catnip bed.

Mint 

Mint and other Nepeta species do not grow well as companion plants for catnip. Being in the same family, they tend to compete aggressively for space and can stunt each other’s growth.

Basil

Basil is susceptible to the same soil pests that catnip deters, and could benefit from that association. However, it prefers more moisture, nutrients, and shade, making them incompatible in terms of care.

Rue

Although rue also repels pests, it also tends to discourage the growth of other herbs nearby, including catnip.

Fennel

Fennel releases allelopathic compounds that inhibit the growth of nearby plants, including catnip.

Cilantro

Cilantro prefers moist, well-drained soil and cooler temperatures, making it a poor companion for catnip, which prefers full sun and has drought-tolerant habits.

Lavender

Lavender prefers drier soil, while catnip likes more moisture, so their needs don’t align very well. Avoid growing these two next to each other.

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