Creating a plant rotation plan for outdoor plant boxes is essential for maintaining soil health and maximizing crop yields. Start by dividing your plants into categories such as legumes, leafy greens, root vegetables, and fruiting plants. Rotate these groups annually to prevent soil depletion and reduce pest buildup. For example, follow nitrogen-fixing legumes with heavy feeders like tomatoes. Keep a garden journal to track planting dates and soil conditions. Consider companion planting to enhance growth and deter pests. By planning ahead, you can enjoy a thriving garden year after year.