Yes, you can grow tamarind in an outdoor plant box, but it requires careful attention to its tropical needs. Tamarind trees (Tamarindus indica) thrive in warm climates and need full sunlight, well-draining soil, and consistent moisture. Here’s how to succeed:

1. Choose the Right Container: Opt for a large, sturdy plant box (at least 24 inches deep and wide) to accommodate the tree’s root system. Ensure it has drainage holes to prevent waterlogging.

2. Soil Requirements: Use a sandy, loamy mix with good drainage. Adding compost or organic matter can enhance fertility.

3. Sunlight and Temperature: Tamarind needs 6–8 hours of direct sunlight daily. If you live in a cooler region, move the plant box indoors during winter or use a greenhouse.

4. Watering and Fertilizing: Keep the soil moist but not soggy. Water deeply when the top inch feels dry. Feed with a balanced fertilizer every 2–3 months during the growing season.

5. Pruning and Maintenance: Regularly prune to manage size and shape. Tamarind trees can grow tall, but container growth naturally limits their height.

With proper care, your tamarind tree can flourish in an outdoor plant box, yielding its signature tangy pods in 6–8 years. Patience and attention to its tropical preferences are key!