If you're looking to grow iodine-accumulating plants in an outdoor plant box, selecting the right species is key to maximizing health benefits and garden success. Iodine-rich plants not only thrive in outdoor settings but also contribute to a nutrient-dense environment. Here are the top picks for your iodine-accumulating plant box:

1. Seaweed (Kelp): A powerhouse of iodine, seaweed is perfect for coastal gardens or hydroponic setups. It absorbs iodine directly from seawater or iodine-enriched solutions.

2. Spinach: This leafy green accumulates iodine efficiently when grown in iodine-fortified soil, making it a versatile choice for plant boxes.

3. Kale: Known for its hardiness, kale can absorb iodine from soil amendments, offering both nutritional value and aesthetic appeal.

4. Strawberries: Surprisingly, strawberries can accumulate iodine when grown in treated soil, adding a sweet twist to your iodine-rich garden.

5. Watercress: Thriving in moist conditions, watercress is an excellent iodine accumulator and a flavorful addition to salads.

Tips for Success:

- Use iodine-rich fertilizers or seaweed-based solutions to boost uptake.

- Ensure proper drainage in your plant box to prevent waterlogging.

- Monitor soil pH to optimize iodine absorption (ideal range: 6.0–7.0).

By incorporating these plants into your outdoor plant box, you’ll create a vibrant, health-boosting garden that’s as functional as it is beautiful. Happy gardening!