To grow thriving outdoor plants, a gardener needs a solid foundation. Miracle-Gro All-Purpose Garden Soil provides your annuals, perennials, and vegetables with the necessary nutrients for healthy growth. The versatile mixture feeds your greenery for about three months, thanks to a constant stream of plant food released into the ground. It also boosts the quality of your existing soil to promote big and beautiful plants. Available at Lowe’s; $4.48.