Eggplant Companion Plants

Claim. Eggplant is a preferred host of Colorado potato beetle and shares soil-borne wilts with potato; adjacent plantings let beetles move between them.

Mechanism. Shared pest and pathogens within the nightshade family.

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

Management. Hand-pick beetles; Rotate nightshades together.

Applies when. Where Colorado potato beetle occurs (North America, Europe).

Limitations. Manageable trade-off; mainly a rotation issue.

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

Sources. University of California Statewide Integrated Pest Management Program 2025; University of Minnesota Extension 2023

Reviewed August 15, 2026 by Garden Planner editorial team (pending independent horticultural review). Record potato--eggplant--shared_pest v1. Request a correction.

Claim. We did not find a source that establishes a benefit or harm between eggplant and bush beans.

Mechanism. None documented.

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

Applies when. The planner evaluates spacing, light, water and timing normally.

Limitations. Traditionally paired; no evidence found.

Evidence. Unknown: No source meeting the inclusion rules. (none).

Sources. University of Minnesota Extension 2023

Reviewed August 15, 2026 by Garden Planner editorial team (pending independent horticultural review). Record eggplant--bush-beans--other v1. Request a correction.

Claim. We did not find a source that establishes a benefit or harm between pepper and eggplant.

Mechanism. None documented.

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

Applies when. The planner evaluates spacing, light, water and timing normally.

Limitations. Same family and rotation group; no companion effect documented.

Evidence. Unknown: No source meeting the inclusion rules. (none).

Sources. University of Minnesota Extension 2023

Reviewed August 15, 2026 by Garden Planner editorial team (pending independent horticultural review). Record pepper--eggplant--other v1. Request a correction.