Arranging flowering plants in an outdoor plant box can transform your garden into a vibrant oasis. Start by selecting a mix of tall, medium, and trailing plants to create depth and visual interest. Place taller plants like salvia or foxgloves at the back, mid-height blooms such as petunias or marigolds in the middle, and cascading varieties like lobelia or sweet alyssum at the front.

Consider color harmony by grouping complementary or contrasting hues for a striking effect. For a cohesive look, stick to a monochromatic palette or blend warm and cool tones. Ensure proper spacing to allow plants room to grow and avoid overcrowding.

Don’t forget sunlight requirements—group sun-loving plants together and shade-tolerant varieties in another box. Regular watering and fertilizing will keep your arrangement lush and blooming all season. With these tips, your outdoor plant box will be a stunning focal point in your garden.