Growing a small magnolia tree in an outdoor plant box is absolutely possible with proper care and attention. While magnolias are typically grown in gardens, dwarf varieties like 'Little Gem' or 'Teddy Bear' magnolias adapt well to container living. The key factors for success include selecting a plant box at least 24 inches deep with excellent drainage, using acidic well-draining soil, and ensuring the container is large enough to accommodate root growth. Position your plant box in a spot that receives 4-6 hours of sunlight daily and protect it from harsh winds. Regular watering (keeping soil moist but not soggy) and seasonal fertilization will help your potted magnolia thrive. Remember that container-grown magnolias may need more frequent watering than ground-planted ones and may require repotting every 2-3 years as they grow. With proper care, you can enjoy the magnificent blooms and sweet fragrance of a magnolia right on your patio or balcony.