Arranging edible plants in an outdoor plant box requires careful planning to maximize space, sunlight, and companion planting benefits. Start by selecting plants with similar sunlight and water needs, such as herbs like basil and thyme, or leafy greens like lettuce and spinach. Place taller plants, like tomatoes or peppers, at the back to avoid shading smaller ones. Utilize vertical space with climbing plants like beans or cucumbers. Group companion plants together, such as carrots and onions, to deter pests naturally. Ensure proper spacing to prevent overcrowding and promote healthy growth. Rotate crops seasonally to maintain soil fertility. With these tips, your outdoor plant box will yield a bountiful, organized harvest.