Growing tomatoes in outdoor plant boxes can be highly rewarding, especially when paired with the right companion plants. Companion planting not only maximizes space but also enhances tomato health by deterring pests, improving soil nutrients, and attracting pollinators. Here are some of the best companion plants for tomatoes:

1. Basil – Repels pests like whiteflies and mosquitoes while improving tomato flavor.

2. Marigolds – Their strong scent deters nematodes and other soil-borne pests.

3. Nasturtiums – Act as a trap crop for aphids, keeping them away from tomatoes.

4. Carrots – Loosen the soil, allowing better root growth for tomatoes.

5. Borage – Attracts pollinators and may improve tomato disease resistance.

Avoid planting tomatoes near cabbage, corn, or fennel, as they can hinder growth. By choosing the right companions, you can create a thriving, pest-resistant tomato garden in your outdoor plant boxes. Happy gardening!