Arranging plants in an outdoor plant box for maximum visual impact involves a thoughtful combination of height, color, texture, and seasonal interest. Start by selecting a focal plant—such as a tall ornamental grass or a flowering shrub—to anchor the design. Surround it with medium-height plants like trailing ivy or bushy petunias to create depth. For added vibrancy, incorporate low-growing flowers or foliage with contrasting hues.

Layering is key: place taller plants at the back or center (depending on visibility) and cascade shorter varieties toward the edges. Mix evergreen plants with seasonal blooms to ensure year-round appeal. Don’t forget to consider sunlight and watering needs when grouping plants together. With these strategies, your outdoor plant box will become a striking centerpiece in any garden or patio space.