Creating a layered planting design in an outdoor plant box is a fantastic way to add depth, texture, and visual interest to your garden. Start by selecting a variety of plants with different heights, colors, and growth habits. Taller plants like ornamental grasses or small shrubs should be placed at the back or center, while medium-sized plants such as flowering perennials fill the middle layer. Low-growing ground covers or trailing plants like ivy or creeping thyme can spill over the edges for a lush, cascading effect.

Ensure proper drainage by adding a layer of gravel or broken pottery at the bottom of the box, followed by high-quality potting mix. Group plants with similar sunlight and water needs together to simplify maintenance. For a cohesive look, choose a color scheme or theme, such as pastels or vibrant tropical hues.

Regular pruning and fertilizing will keep your layered design thriving. With careful planning and creativity, your outdoor plant box can become a miniature masterpiece of layered beauty.