Yes, you can grow turmeric in an outdoor plant box! Turmeric (Curcuma longa) thrives in warm, humid conditions, making it suitable for container gardening if given proper care. Here’s how to do it successfully:

1. Choose the Right Plant Box: Opt for a deep, wide container (at least 12 inches deep) to accommodate turmeric’s spreading rhizomes. Ensure it has drainage holes to prevent waterlogging.

2. Soil Requirements: Use well-draining, fertile soil mixed with compost. Turmeric prefers slightly acidic to neutral pH (6.0–7.5).

3. Planting Rhizomes: Plant fresh, organic turmeric rhizomes 2–4 inches deep, with buds facing upward. Space them 12–16 inches apart for optimal growth.

4. Sunlight & Temperature: Place the plant box in a spot with partial shade to full sun (4–6 hours of sunlight daily). Turmeric loves warmth—ideal temperatures range between 68–95°F (20–35°C).

5. Watering & Care: Keep the soil consistently moist but not soggy. Mulch to retain moisture and regulate soil temperature. Fertilize monthly with organic compost or a balanced fertilizer.

6. Harvesting: Turmeric takes 8–10 months to mature. When leaves yellow and dry, gently dig up rhizomes, rinse, and dry them for storage.

With patience and proper care, your outdoor plant box can yield a bountiful turmeric harvest!