Growing a small apricot tree in an outdoor plant box is entirely possible with the right conditions and care. Apricot trees thrive in well-draining soil and require at least 6-8 hours of sunlight daily. Choose a dwarf or semi-dwarf variety, as these are better suited for container growth. Ensure the plant box is large enough (at least 18-24 inches deep and wide) to accommodate the tree's roots. Regular watering, fertilization, and pruning are essential for healthy growth and fruit production. With proper attention, your apricot tree can flourish and even bear delicious fruit in a compact outdoor space.