Yes, you can absolutely grow rosemary in an outdoor plant box! Rosemary is a hardy, drought-tolerant herb that thrives in well-draining soil and full sunlight, making it an excellent choice for container gardening. Here’s how to ensure success:

1. Choose the Right Plant Box: Opt for a sturdy, well-draining container at least 12 inches deep to accommodate rosemary’s root system. Terra cotta or wooden boxes work well.

2. Soil Requirements: Use a lightweight, sandy potting mix with added perlite or gravel to improve drainage—rosemary dislikes soggy roots.

3. Sunlight: Place the plant box in a spot that receives 6-8 hours of direct sunlight daily. Rosemary loves warmth and bright light.

4. Watering: Water sparingly, allowing the soil to dry between waterings. Overwatering can lead to root rot.

5. Pruning & Care: Trim regularly to encourage bushier growth and prevent legginess. In colder climates, move the box indoors during frost.

With proper care, your outdoor plant box can yield fragrant, flavorful rosemary for culinary and decorative use year-round!