2pk Miracle-Gro Potting Mix $10

This 2-Pack of Miracle-Gro 8-Quart Seed-Starting Potting Mix drops from $12.99 to $10.38 at Amazon. This potting mix is considered the best option for growing your plants inside from seeds before transplanting them outside. It matches the best deal we found from any major retailer, with the bonus benefit of free Prime shipping. Shipping is also free when you spend $35. Otherwise, it adds $6.99.