When it comes to enriching your outdoor plant boxes with potassium, certain plants stand out for their ability to accumulate this essential nutrient. Potassium is vital for plant growth, improving disease resistance, and enhancing fruit quality. Here are some of the best plants to consider:

1. Comfrey – Known as a dynamic accumulator, comfrey draws potassium from deep soil layers and stores it in its leaves, making it perfect for composting or mulching.

2. Banana Plants – While typically grown in warmer climates, banana plants are potassium powerhouses, enriching the soil as they decompose.

3. Nasturtiums – These vibrant flowers not only add beauty but also accumulate potassium, benefiting nearby plants.

4. Yarrow – A hardy perennial, yarrow improves soil potassium levels and attracts beneficial insects.

5. Dandelions – Often overlooked, dandelions are excellent at extracting potassium and other nutrients from the soil.

To maximize potassium accumulation, regularly chop and drop these plants to allow nutrients to return to the soil. Pairing them with other nutrient-rich plants can create a balanced, fertile garden ecosystem. Happy gardening!