Dill growing profile.

Dill Companion Plants

What may help, what can compete, and where the evidence is still uncertain.

Dill Anethum graveolens

Cool-season herb in the carrot family. View plant profile →

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Quick answer

Evidence supports or conditionally supports growing dill with Cabbage. 1 traditional pairing is listed separately because the review found no adequate evidence.

Every status below has a direction, mechanism, context and source. "No verified relationship" means we looked and found nothing usable; the planner then evaluates spacing, light, water and timing normally. How we classify evidence →

Conditional benefit (1)

Positive only when the stated conditions match; otherwise informational.

CabbageBrassica oleracea var. capitataConditionalSupports beneficial insects · cabbage aphid, cabbage white caterpillars Dill may affect CabbageSpring–Fall · strip · Within a few metres of the cabbage.Tier C Review: August 15, 2026

Why?

Claim. Flowering dill is attractive to hoverflies, lacewings and parasitic wasps that attack cabbage pests; an effect on pest numbers in cabbage is plausible but not directly measured.

Mechanism. Small, open umbel flowers supply nectar and pollen to natural enemies.

Studied in. Field observation of insect visits to insectary plants (California); diversity meta-analysis. (field)

Conditions. Sow dill 2–3 weeks before cabbage so it flowers during the pest season. Within a few metres of the cabbage. Dill must be flowering while cabbage pests are present; leafy dill does nothing for beneficials.

Management. Let dill flower; Stagger sowings for continuous bloom.

Applies when. Low-cost experiment with a documented mechanism.

Limitations. No cabbage-specific outcome trial found; dill is tall and self-seeds.

Evidence. Tier C: Indirect evidence: greenhouse or pot work, a related crop or species, or credible extension guidance with important uncertainty. (field trial).

Sources. Hogg 2011; Letourneau 2011

Reviewed August 15, 2026 by Garden Planner editorial team (pending independent horticultural review). Record dill--cabbage--insectary_support v1. Request a correction.

Traditional claim (1)

Never a hard rule; may appear as an optional experiment.

Traditional claims are shown separately because repetition across charts is not evidence. They never change a planner score; treat them as optional experiments.

TomatoSolanum lycopersicumTraditionalFlavour or growth claim Dill may affect TomatoSummer · arrangement unspecifiedTier D Review: August 15, 2026

Why?

Claim. Mature, flowering dill is said to stunt tomatoes while young dill helps them. No controlled evidence for either; dill is tall and self-seeds, which can crowd neighbours.

Mechanism. Claimed by tradition; no harmful interaction demonstrated.

Conditions. Planted together Both plants must be present at the same time.

Applies when. The planner does not separate these plants on this claim; it evaluates space, light, water and timing normally.

Limitations. Manage dill's size and seeding.

Evidence. Tier D: Traditional knowledge or structured community observations without a controlled comparison. (tradition).

Sources. University of Minnesota Extension 2023

Reviewed August 15, 2026 by Garden Planner editorial team (pending independent horticultural review). Record dill--tomato--flavor_or_growth v1. Request a correction.

**A realistic garden scene where dill grows beside a plant with a traditional or unknown relationship.**Coexistence in a photograph is not evidence that the plants affect each other.

Example layout for dill

Documented arrangement with Cabbage: strip. Within a few metres of the cabbage. Sow dill 2–3 weeks before cabbage so it flowers during the pest season.

Worked example based on the record, not a photograph of a trial.

**Side view of dill (60–120 cm) beside typical companions, showing canopy, support, shade and access.**

When these companions overlap

Bed occupancy in Portland, Oregon (estimates). A relationship only matters while both plants are present.

Dill

Cabbage18 wk overlap

Tomato30 wk overlap

Overlap in weeks
Cabbage	18 weeks
Tomato	30 weeks

Crop rotation guidance

Rotation is about what occupied the bed in previous seasons and is calculated separately from the live companion relationships above.

Rotate dill on a 2-year cycle with other carrot family crops (Carrot, Parsnip, Celery, Parsley, Cilantro). Shared risks: carrot rust fly, Alternaria leaf blight, parsley worm (swallowtail caterpillar).

Crop rotation hub · Apiaceae family page

Physical and resource fit

Cabbage: Dill would shade Cabbage.

Fit checks come from plant attributes and apply even when a pairing has a positive claim.

Community observations (anecdotal)

These reports come from gardeners and are not reviewed evidence. Results vary with soil, climate and practice. Community data never changes an evidence tier or a planner score.

Reports for dill: 0 (community submissions open in a later phase; drafts are stored only on your device).

**Community-submitted photo area (moderated) with context fields: region, season, layout, varieties, outcome.**

Record an observation

Evidence summary and sources

Attractiveness of common insectary and harvestable floral resources to beneficial insects — Biological Control, 2011 (field)
Does plant diversity benefit agroecosystems? A synthetic review — Ecological Applications, 2011 (synthesis)
Companion planting in home gardens — University of Minnesota Extension, 2023 (guidance)

Reviewer: Garden Planner editorial team (pending independent horticultural review). Status counts on the Companions A–Z page are derived from these records. Corrections.