Yes, you can grow dwarf turmeric plants in an outdoor plant box with the right conditions. Turmeric, a tropical plant, thrives in warm climates but can adapt to container gardening if given proper care. Here’s how to ensure success:

1. Choose the Right Plant Box: Opt for a deep, well-draining container (at least 12 inches deep) to accommodate the rhizome’s growth.

2. Soil Requirements: Use loose, fertile soil with good drainage. A mix of potting soil and compost works well.

3. Sunlight: Place the plant box in a spot with partial to full sunlight (4-6 hours daily).

4. Watering: Keep the soil consistently moist but not waterlogged. Reduce watering in cooler months.

5. Temperature: Protect plants from frost; move indoors if temperatures drop below 50°F (10°C).

With these steps, your dwarf turmeric can flourish outdoors, yielding vibrant rhizomes and lush foliage. Happy gardening!