If you're considering growing a small franklinia (Franklinia alatamaha) in an outdoor plant box, the answer is yes—but with some important considerations. Franklinia trees are rare and delicate, requiring specific conditions to thrive.

Choosing the Right Plant Box:

- Ensure the box is large enough (at least 24 inches deep and wide) to accommodate root growth.

- Opt for durable, weather-resistant materials like cedar or fiberglass.

- Proper drainage is critical; drill holes if necessary.

Soil and Care Tips:

- Use well-draining, acidic soil (pH 5.0–6.5) to mimic the franklinia's natural habitat.

- Place the box in partial shade to protect the tree from harsh sunlight.

- Water regularly but avoid soggy soil, as franklinia is prone to root rot.

Winter Protection:

In colder climates, insulate the plant box or move it indoors to protect the tree from freezing temperatures.

With proper care, an outdoor plant box can be a great temporary home for a small franklinia, though eventual transplanting to the ground may be ideal for long-term health.