If you're considering growing a small calycanthus (also known as sweetshrub) in an outdoor plant box, the answer is yes—with a few important considerations. Calycanthus plants thrive in well-draining soil and prefer partial to full sunlight, making them adaptable to container gardening.

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

Regular watering and occasional fertilizing will help your calycanthus flourish. Prune lightly after flowering to maintain its shape and encourage healthy growth. With the right care, your small calycanthus can thrive beautifully in an outdoor plant box, adding charm to your garden or patio.