I'm a newbie gardener. I have three Earthboxes that I plan to put tomatoes, peppers, and cucumbers in this summer. They require a cup of dolomite and then 2-3 cups of fertilizer poured in a strip on the opposite side of the box from where the plants will be. Looking at my fertilizer, I realized that I accidentally purchased Miracle Gro Organic Fertilizer, but it's for in-ground planting, not for containers. What is the difference between in-ground and container fertilizers? Will it make that big of a difference?