Yes, you can grow dwarf olive trees in an outdoor plant box! These compact varieties, such as 'Little Ollie' or 'Skylark,' are perfect for container gardening. To ensure success, choose a large, sturdy plant box with excellent drainage. Use well-draining soil mixed with sand or perlite to mimic their native Mediterranean conditions. Place the box in a sunny spot, as olive trees thrive with at least 6-8 hours of sunlight daily.

Water moderately, allowing the soil to dry slightly between waterings, and avoid overwatering to prevent root rot. Fertilize lightly in spring and summer with a balanced fertilizer. Prune occasionally to maintain shape and encourage airflow. With proper care, your dwarf olive tree can flourish in an outdoor plant box, adding a touch of Mediterranean charm to your space.