What should not be planted near container eggplants?

Published: September 15, 2025
Updated: September 15, 2025

Selecting companion plants that are not suitable alongside container eggplants can be detrimental. Some species have the potential to spread diseases. In contrast, others may inhibit growth, and still others invite destructive pests. I learned this the hard way when my entire crop crumbled due to poor plant placement. Knowing about these relationships will help you save your harvest.

Tomatoes are harmful to container eggplant neighbors. They share diseases such as verticillium wilt, which spreads quickly in small areas. Planting them together will almost certainly create a cross-infection. When I tried them in my balcony garden, my plants developed yellow leaves within a few weeks of that combination.

Disease Spreaders

  • Tomatoes: verticillium wilt carrier
  • Potatoes: blight transmission risk
  • Peppers: fungal spore transfer

Growth Inhibitors

  • Fennel: root secretions stunt eggplant
  • Walnut trees: juglone toxicity
  • Sunflowers: allelopathic compounds

Pest Magnets

  • Corn: attracts spider mites
  • Beans: draws aphid colonies
  • Broccoli: flea beetle attractant

Fennel releases root chemicals that repress eggplant growth. Even if separated into pots nearby, the growth dramatically slowed down. Corn also introduces a new problem by attracting spider mites that hop over to the eggplants. I lost all my plants before realizing the connection.

Companion Planting Guide
Avoid Near Eggplants
Tomatoes
Safe AlternativesBasilBenefit
Repels flies and mosquitoes
Avoid Near Eggplants
Fennel
Safe AlternativesBeansBenefit
Fixes nitrogen in soil
Avoid Near Eggplants
Corn
Safe AlternativesMarigoldsBenefit
Deters nematodes and beetles

When placing containers on decks and balconies, ensure you maintain a personal space of 6-10 feet from plants that do not grow well together, if possible. Group eggplant with its companion plants, such as basil and marigolds, if possible. I significantly reduced pest problems by 80% while growing faster than those in poor combinations.

Use these guidelines for companion planting for healthier container gardens. Your eggplants will be disease-free and flea beetle-free. Start rearranging your arrangements today. Your harvests will be better for it. Share your companion planting problems with us on our gardening forum.

Read the full article: How to Grow Eggplant in Containers

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