Growing a small banana plant in an outdoor plant box is entirely possible, provided you meet its specific needs. Banana plants thrive in warm, humid environments and require well-draining soil, ample sunlight, and consistent moisture.

When selecting an outdoor plant box, ensure it is large enough to accommodate the banana plant's root system—ideally at least 18-24 inches deep and wide. Proper drainage is crucial to prevent root rot, so choose a box with drainage holes or add a layer of gravel at the bottom.

Banana plants are heavy feeders, so regular fertilization with a balanced, potassium-rich fertilizer will promote healthy growth. In colder climates, consider moving the plant box indoors during winter or providing frost protection.

With the right care, your small banana plant can flourish in an outdoor plant box, adding a tropical touch to your garden or patio.