Yes, you can absolutely use an outdoor plant box to grow plants for natural dyes! This eco-friendly and creative approach allows you to cultivate a variety of plants that yield vibrant, plant-based colors for fabrics, art, and more.

Best Plants for Natural Dyes:

1. Indigo (Indigofera tinctoria): Produces rich blue hues.

2. Madder (Rubia tinctorum): Known for its deep reds and pinks.

3. Weld (Reseda luteola): Yields bright yellow shades.

4. Coreopsis (Coreopsis tinctoria): Offers golden yellows and oranges.

5. Black-eyed Susan (Rudbeckia hirta): Provides earthy browns and greens.

Tips for Success:

- Choose a sunny location for your plant box, as most dye plants thrive in full sun.

- Ensure well-draining soil to prevent root rot.

- Water regularly but avoid overwatering.

- Harvest leaves, flowers, or roots at peak color intensity for the best dye results.

Growing your own dye plants in an outdoor plant box is a rewarding way to connect with nature and create sustainable, chemical-free colors. Start small, experiment, and enjoy the process of turning your garden into a source of natural artistry!