Creating a thriving outdoor plant box in high-sodium environments, such as coastal areas or urban settings with road salt exposure, requires careful plant selection. Sodium-accumulating plants are ideal for these conditions, as they tolerate or even thrive in salty soils. Here are some top choices for your outdoor plant box:

1. Sea Lavender (Limonium latifolium) – Known for its tolerance to salty air and soil, this perennial produces delicate purple flowers and thrives in full sun.

2. Saltbush (Atriplex halimus) – A hardy shrub with silvery foliage, perfect for absorbing excess sodium while adding texture to your planter.

3. Beach Wormwood (Artemisia stelleriana) – This low-maintenance plant features silvery leaves and thrives in sandy, salty conditions.

4. New Zealand Spinach (Tetragonia tetragonioides) – An edible option that grows well in salty soils, offering both beauty and utility.

5. Yucca (Yucca filamentosa) – A drought- and salt-tolerant plant with striking architectural form, ideal for modern outdoor spaces.

For best results, ensure proper drainage and occasional flushing of the soil to prevent excessive salt buildup. Pair these plants with organic mulch to retain moisture and improve soil health. By selecting sodium-accumulating species, you can create a lush, resilient outdoor plant box even in challenging environments.