Yes, you can grow a small witch hazel (Hamamelis) in an outdoor plant box, provided you meet its basic growing requirements. Witch hazel is a hardy shrub known for its vibrant, spidery flowers and fragrant blooms, making it a charming addition to container gardens.

To ensure success, choose a compact or dwarf variety suited for confined spaces. The plant box should be large enough to accommodate root growth—ideally at least 18-24 inches deep and wide. Use well-draining, slightly acidic soil and place the box in a spot with partial to full sunlight (4-6 hours daily).

Regular watering is essential, especially during dry spells, but avoid waterlogging. Mulching helps retain moisture and regulate soil temperature. Prune lightly after flowering to maintain shape and encourage healthy growth.

With proper care, your witch hazel can thrive in an outdoor plant box, offering year-round interest with its unique blooms and autumn foliage.