Quick answer: Cucumbers, Cabbage and broccoli, Lettuce are practical neighbors for dill when spacing and seasonal needs align. Avoid crowding and unverified claims that a fragrant plant repels every pest. Design around mature growth, access and the specific harvest you want.
Dill (Anethum graveolens) grows as a feathery annual herb that can become tall and hollow-stemmed when flowering. Unlike low basil, it develops umbels that attract a range of insects, including hoverflies and parasitoids. A key design decision is whether the harvest goal is tender leaves, seed heads for pickling or flowers for wildlife; the same stem cannot remain a tender leaf crop indefinitely.
How to choose companions for dill
Good companion planting combines plant biology with calendar planning. Instead of copying a universal friends-and-enemies list, decide whether a neighbor offers efficient space use, another harvest, or insect habitat. Ask whether either plant will be shaded, deprived of water, or damaged at harvest. University of Minnesota Extension’s evidence review explains why some combinations are useful while many traditional claims are unsupported.
Best dill companion plants: comparison
| Neighbor | Practical benefit | How to place it |
|---|---|---|
| Cucumbers | Dill is a convenient culinary neighbor in a larger vegetable patch, especially if pickles are planned. | Keep adequate growing and maintenance space. |
| Cabbage and broccoli | Flowering dill near brassicas may support natural enemies of some pests, but row covers and direct caterpillar scouting still matter. | Keep adequate growing and maintenance space. |
| Lettuce | Dill and lettuce can share cool-season bed space with enough spacing; their growth rates and eventual heights differ. | Keep adequate growing and maintenance space. |
| Tomatoes | Dill can be placed outside a tomato cage or trellis; mature flowering stems should not shade crowded tomatoes. | Keep adequate growing and maintenance space. |
| Calendula and alyssum | Blossoms with different shapes and bloom times can complement dill’s umbels in an adjacent insectary strip. | Keep adequate growing and maintenance space. |
Cucumbers: when this pairing makes sense
Dill is a convenient culinary neighbor in a larger vegetable patch, especially if pickles are planned. A flower strip can provide resources for insects without becoming tangled in cucumber vines.
Check mature dimensions rather than nursery-pot size. A pairing can look perfect in spring and become crowded by midsummer. Keep the primary crop healthy, and relocate or harvest the companion if it begins to block light or inspection access. Growing plants near one another does not require they share the same planting hole.
Cabbage and broccoli: when this pairing makes sense
Flowering dill near brassicas may support natural enemies of some pests, but row covers and direct caterpillar scouting still matter.
Check mature dimensions rather than nursery-pot size. A pairing can look perfect in spring and become crowded by midsummer. Keep the primary crop healthy, and relocate or harvest the companion if it begins to block light or inspection access. Growing plants near one another does not require they share the same planting hole.
Lettuce: when this pairing makes sense
Dill and lettuce can share cool-season bed space with enough spacing; their growth rates and eventual heights differ.
Check mature dimensions rather than nursery-pot size. A pairing can look perfect in spring and become crowded by midsummer. Keep the primary crop healthy, and relocate or harvest the companion if it begins to block light or inspection access. Growing plants near one another does not require they share the same planting hole.
Tomatoes: when this pairing makes sense
Dill can be placed outside a tomato cage or trellis; mature flowering stems should not shade crowded tomatoes.
Check mature dimensions rather than nursery-pot size. A pairing can look perfect in spring and become crowded by midsummer. Keep the primary crop healthy, and relocate or harvest the companion if it begins to block light or inspection access. Growing plants near one another does not require they share the same planting hole.
Calendula and alyssum: when this pairing makes sense
Blossoms with different shapes and bloom times can complement dill’s umbels in an adjacent insectary strip.
Check mature dimensions rather than nursery-pot size. A pairing can look perfect in spring and become crowded by midsummer. Keep the primary crop healthy, and relocate or harvest the companion if it begins to block light or inspection access. Growing plants near one another does not require they share the same planting hole.
What not to plant too close
Carrots grown for seed
Dill and carrots share a family and attract some of the same insects. Avoid confusing their seed heads or allowing volunteer plants to obstruct carrot thinning. Think in terms of root-zone competition, timing, airflow, and access rather than an unsupported claim that the species are chemically incompatible.
Wind-exposed corners
Tall hollow stems can bend or blow down. A sheltered border is more practical. Think in terms of root-zone competition, timing, airflow, and access rather than an unsupported claim that the species are chemically incompatible.
Permanent tiny herb pots
Mature dill roots and stalks need space and are not ideal crowded with many other herbs. Think in terms of root-zone competition, timing, airflow, and access rather than an unsupported claim that the species are chemically incompatible.
A working bed layout for dill
For a pollinator strip beside cabbage, place several dill seedlings outside the main row, spaced for mature stems. Leave flowering plants where you can inspect brassica leaves and fit row covers on young crops. For kitchen leaves, sow additional dill small batches at intervals rather than expecting an old flowering plant to produce tender foliage all season.
Start by marking the main crop’s mature footprint and the paths used for watering, harvesting and checking for disease. Add only companions that fit the remaining space. The GardenVoila plant-spacing calculator and raised-bed planner can help sketch a feasible arrangement, but always use crop-specific planting instructions for final distances.
Pests, pollination and realistic expectations
Dill often serves as a host plant for swallowtail butterfly caterpillars. Those caterpillars eat dill leaves, so decide whether your planting is for wildlife or the kitchen and allocate plants accordingly. Direct sowing is usually better than transplanting because dill has a taproot; University of Minnesota Extension recommends sowing where it will grow.
Inspect plants directly rather than using another plant as an assumed pesticide. Beneficial insects depend on suitable flowers and habitat, yet their presence does not guarantee a particular yield. Rotation and sanitation matter when neighboring plants share pests. Learn more from the University of Minnesota companion-planting review.
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Frequently asked questions
What vegetables grow near dill?
Cucumbers, brassicas and lettuce can share a larger garden with dill if light and root space are managed.
Does dill attract beneficial insects?
Flowering umbels are used by some beneficial insects; this supports habitat but does not guarantee pest removal.
Can dill grow next to fennel?
They can coexist in separate pockets; both can become large and self-seed, so maintain spacing and weed control.
Next steps and relevant guides
For another crop-specific perspective, compare this GardenVoila planting guide and the related growing guide. Focus on the practical question: will both crops grow healthily, remain accessible and actually deliver the intended benefit?
Research and further reading
- University of Minnesota Extension: Growing dill
- University of Minnesota Extension: Companion planting in home gardens
Featured photo: Photo: Bff / Wikimedia Commons source · CC BY-SA 3.0 · Resized for web display.
