Yes, you can grow patchouli in an outdoor plant box, provided you meet its basic growing requirements. Patchouli (Pogostemon cablin) is a tropical herb that thrives in warm, humid conditions with well-draining soil. Here’s how to ensure success:

1. Choose the Right Plant Box: Opt for a spacious container with drainage holes to prevent waterlogging. A wooden or ceramic box works well.

2. Soil Preparation: Use a rich, loamy soil mix with organic compost. Patchouli prefers slightly acidic to neutral pH (5.5–7.0).

3. Sunlight Needs: Place the box in a spot with partial shade to full sun (4–6 hours of sunlight daily). In hotter climates, afternoon shade is ideal.

4. Watering Routine: Keep the soil consistently moist but not soggy. Patchouli loves humidity, so misting the leaves occasionally helps.

5. Fertilization: Feed with a balanced organic fertilizer every 4–6 weeks during the growing season (spring to fall).

With proper care, your patchouli will grow lush and aromatic, perfect for harvesting leaves for essential oils or potpourri. Happy gardening!