1. Introduction to Rosemary Companion Planting
Rosemary (Rosmarinus officinalis) is a hardy, aromatic herb native to the Mediterranean region. It thrives in well-drained soil and full sun, making it an excellent companion for plants with similar growing conditions. Companion planting with rosemary can enhance garden health by deterring pests, improving soil quality, and maximizing space utilization.
2. Benefits of Companion Planting with Rosemary
Rosemary offers several advantages to neighboring plants:
- Pest Repellent: Its strong scent deters cabbage moths, carrot flies, and bean beetles.
- Soil Improvement: Rosemary's deep roots help prevent soil erosion and improve drainage.
- Pollinator Attraction: Its flowers attract bees and beneficial insects.
3. Best Companion Plants for Rosemary
Below are the top plant pairings for rosemary, categorized by their synergistic benefits:
3.1 Herbs
- Sage (Salvia officinalis): Shares similar water and sunlight needs, and both repel pests.
- Thyme (Thymus vulgaris): Thrives in dry conditions and complements rosemary's growth habits.
- Lavender (Lavandula spp.): Prefers well-drained soil and enhances pollinator activity.
3.2 Vegetables
- Beans (Phaseolus spp.): Rosemary deters bean beetles, protecting the crop.
- Cabbage (Brassica oleracea): Repels cabbage moths when planted nearby.
- Carrots (Daucus carota): Rosemary masks the scent of carrots, reducing carrot fly infestations.
3.3 Flowers
- Marigolds (Tagetes spp.): Deter nematodes and attract pollinators.
- Nasturtiums (Tropaeolum majus): Act as a trap crop for aphids, diverting them from rosemary.
4. Plants to Avoid Near Rosemary
Not all plants thrive alongside rosemary. Avoid pairing it with:
- Basil (Ocimum basilicum): Prefers moist soil, conflicting with rosemary's dry conditions.
- Mint (Mentha spp.): Invasive roots can overcrowd rosemary.
- Pumpkins (Cucurbita pepo): Heavy water needs are incompatible with rosemary.
5. Practical Tips for Planting Rosemary Companions
- Spacing: Allow 12–24 inches between rosemary and companions to prevent overcrowding.
- Soil: Ensure well-drained, slightly alkaline soil (pH 6.0–7.5).
- Watering: Water deeply but infrequently to mimic Mediterranean conditions.
