Companion Planting Distances: Separating Allies and Antagonists

Practical Spacing for Companion Planting

Companion planting isn't about rigid isolation distances—it's about diversity and confusion. The core principle: avoid monoculture blocks. Mix crops, herbs, and flowers throughout beds to disrupt pest host-finding.

Guidelines for "Adversarial" Pairs (e.g., Cabbage & Tomato)

• Same bed, different rows: 2-3 feet apart is sufficient. Root exudate effects are localized.
• Interplant with allies: Put aromatic herbs (thyme, sage, rosemary) or flowers (marigold, nasturtium) between them.
• Opposite ends unnecessary: Only for aggressive allelopaths (black walnut, fennel)—give 10+ feet or separate beds.

Effective Strategies

1. Polyculture beds: Mix 4-6 crop families per 4x8 bed.
2. Herb borders: Perimeter plantings of strong-scented herbs deter pests broadly.
3. Trap crops: Plant pest favorites (nasturtium for aphids, radish for flea beetles) at bed edges.

For detailed charts, visit Avant-Gardening's companion planting page. The key: observe your garden, note what thrives together, and adapt.