Asparagus Companion Plants
Asparagus is a long-lived perennial that stays in the same bed for 15 years or more, so thoughtful neighbors matter. Gardeners have traditionally paired it with plants that draw in beneficial insects and pollinators or that are said to help confuse pests like the asparagus beetle. Companion planting is a folk practice backed by mixed evidence, so treat these pairings as a starting point and watch how they perform in your own garden.
Good companions for Asparagus
| Plant | Why it helps |
|---|---|
| Tomatoes | A classic partner that is said to help discourage asparagus beetles while the asparagus returns the favor against some soil pests. |
| Basil | Its strong scent may help mask the bed from pests, and its flowers bring in pollinators and beneficial insects. |
| Parsley | When allowed to flower it feeds tiny beneficial wasps and hoverflies that prey on garden pests. |
| Dill | The lacy blooms attract ladybugs, lacewings, and parasitic wasps that help keep pest numbers down. |
| Cilantro | Left to bolt, its flowers are a magnet for beneficial insects that patrol the bed. |
| Marigolds | Widely planted as a border to deter pests and add color that draws pollinators. |
| Nasturtiums | Low-growing cover that can act as a trap plant for aphids and other pests while attracting pollinators. |
| Comfrey | A deep-rooted perennial often grown at bed edges; its leaves are traditionally cut and used as mulch to feed the soil. |
Keep Asparagus away from
| Plant | Why to separate them |
|---|---|
| Onions | Alliums are traditionally believed to slow the growth of young asparagus crowns. |
| Garlic | Like other alliums, it is thought to compete with and stunt establishing asparagus. |
| Leeks | Another allium that folk guidance keeps away from asparagus for the same growth concerns. |
| Potatoes | A heavy feeder that competes hard for the same water and nutrients, and the two are said to stunt each other. |
Tips
Set companions at the edges or between rows so they do not crowd the crowns or interfere when you harvest spears in spring. Because the bed is permanent, favor perennial or self-seeding herbs and flowers that come back on their own, and keep aggressive spreaders in check. Remember that companion planting is a traditional practice with variable results, so pair it with basics like good drainage, steady moisture, and prompt removal of pest-damaged foliage.
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Companion planting is a traditional practice; results vary with your climate, soil, and garden. Page updated Aug 4, 2026.