Creating a thriving tarragon garden in outdoor plant boxes requires careful selection of companion plants that complement its growth and enhance its flavor. French tarragon (Artemisia dracunculus) thrives in well-drained soil and full sun, making it ideal for container gardening. Here are the best plants to pair with tarragon in outdoor plant boxes:

1. Lavender – Both tarragon and lavender prefer similar growing conditions, and their aromatic qualities deter pests naturally.

2. Thyme – This low-growing herb pairs well with tarragon and shares its preference for sunny, dry conditions.

3. Chives – Their mild onion flavor complements tarragon, and they help repel aphids.

4. Marjoram – A harmonious companion that thrives in the same soil and light conditions.

5. Nasturtiums – These colorful flowers attract pollinators while deterring pests from tarragon.

Avoid planting tarragon with moisture-loving herbs like mint or parsley, as their watering needs differ. Ensure your plant boxes have proper drainage to prevent root rot. By selecting the right companions, you can create a lush, productive tarragon garden in your outdoor plant boxes.