Yes, you can grow marjoram in an outdoor plant box! Marjoram is a versatile and aromatic herb that thrives in containers, making it an excellent choice for small gardens, balconies, or patios. Here’s how to ensure success:

1. Choose the Right Plant Box: Opt for a box with good drainage holes to prevent waterlogging. A depth of at least 6-8 inches is ideal for root growth.

2. Soil Requirements: Use well-draining potting mix enriched with organic matter. Marjoram prefers slightly alkaline soil (pH 6.7-7.0).

3. Sunlight: Place the box in a sunny spot where the plant receives 6-8 hours of sunlight daily. Marjoram loves warmth and light.

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

5. Pruning and Harvesting: Regularly trim the plant to encourage bushier growth. Harvest leaves as needed, preferably before flowering for the best flavor.

With proper care, your marjoram will flourish in an outdoor plant box, providing fresh herbs for culinary use all season long!