Arranging plant heights in an outdoor plant box is essential for both aesthetics and healthy growth. The key is to layer plants strategically, placing taller varieties at the back or center and shorter ones toward the edges. This ensures sunlight reaches all plants while creating a visually balanced display.

Start by selecting plants with varying heights—such as ornamental grasses or tall flowers for the background, medium-sized herbs or shrubs for the middle, and trailing or low-growing plants like creeping thyme for the front. Consider growth habits and sunlight needs to avoid overcrowding.

For round or freestanding plant boxes, place the tallest plants in the center and gradually decrease height outward. Use trellises or stakes for climbing plants to maximize vertical space. Regular pruning and monitoring will help maintain the arrangement as plants grow.

By thoughtfully arranging heights, your outdoor plant box will thrive and become a stunning focal point in your garden.