Growing a small stewartia in an outdoor plant box is possible, but it requires careful attention to the tree's needs. Stewartias are prized for their beautiful bark, delicate flowers, and vibrant fall foliage, making them a lovely addition to any garden. However, they can be somewhat finicky, especially when grown in containers.

To successfully grow a stewartia in a plant box, choose a dwarf or slow-growing variety, such as *Stewartia pseudocamellia* 'Mint Frills' or *Stewartia monadelpha*. Ensure the container is large enough to accommodate the tree's root system—ideally at least 24 inches in diameter and depth. Use well-draining, acidic soil mixed with organic matter to mimic the stewartia's natural woodland habitat.

Place the plant box in a location with partial shade, as stewartias prefer protection from intense afternoon sun. Water regularly to keep the soil consistently moist but not waterlogged. Mulching the surface helps retain moisture and regulate soil temperature.

Since stewartias are sensitive to extreme temperatures, monitor the plant box during harsh winters or hot summers. In colder climates, consider insulating the container or moving it to a sheltered spot. With proper care, your small stewartia can thrive in an outdoor plant box, adding elegance to patios, balconies, or small gardens.