Yes, you can grow a small leucothoe in an outdoor plant box, provided you meet its basic growing requirements. Leucothoe, a shade-loving evergreen shrub, thrives in well-draining, acidic soil and prefers partial to full shade. When planting in a container, choose a spacious plant box with drainage holes to prevent waterlogging.

For optimal growth, use a mix of peat moss and organic compost to maintain soil acidity. Water regularly to keep the soil moist but not soggy, as leucothoe dislikes drought. Mulching helps retain moisture and regulate temperature.

While leucothoe is hardy, protect it from harsh winter winds if your climate is cold. Prune lightly in spring to maintain shape and encourage bushier growth. With proper care, your leucothoe will flourish in an outdoor plant box, adding year-round greenery to your space.