Yes, you can grow dwarf cardamom plants in an outdoor plant box, provided you meet their specific growing conditions. Dwarf cardamom (Elettaria cardamomum) thrives in warm, humid environments with filtered sunlight, making it suitable for container gardening.

To ensure success, choose a spacious plant box with good drainage and fill it with rich, well-draining soil. Cardamom prefers slightly acidic to neutral soil (pH 6.0–7.0). Place the box in a shaded or partially shaded area, as direct sunlight can scorch the leaves.

Water the plant regularly to keep the soil consistently moist but not waterlogged. Mulching helps retain moisture and regulate soil temperature. Fertilize monthly with a balanced organic fertilizer to promote healthy growth.

In cooler climates, move the plant box indoors during winter or provide frost protection. With proper care, your dwarf cardamom plant can flourish in an outdoor plant box, yielding aromatic pods for culinary use.