Arranging native medicinal plants in an outdoor plant box requires careful planning to ensure healthy growth and visual harmony. Start by selecting plants with similar sunlight and water needs, such as echinacea, lavender, and chamomile. Group taller plants like yarrow or valerian at the back of the box, while placing shorter herbs like thyme or mint near the front for easy access.

Ensure proper spacing—about 6-12 inches between plants—to prevent overcrowding and promote air circulation. Use well-draining soil enriched with organic compost to support root health. Consider sunlight exposure; most medicinal herbs thrive in full sun, but partial shade varieties like lemon balm can be placed accordingly.

For a layered look, incorporate trailing plants like creeping rosemary along the edges. Regularly prune and harvest to maintain shape and encourage new growth. This arrangement not only maximizes space but also creates a functional, beautiful herbal garden.