Right now there are 151 deals from Amazon Resale, formerly Amazon Warehouse Deals, in Patio, Lawn & Garden › Gardening & Lawn Care › Soils, Fertilizers & Mulches. These are inspected returns and open-box items that Amazon sells and ships itself. WarehouseHunter puts each one next to its current new price, so you can see what you save at a glance.
Brands with the most offers here: Scotts, Miracle-Gro, Espoma, SuperMoss, 100%, Back to the Roots, Athena, Butterfly. Every item is a one-off, so the stock moves all day and new deals keep arriving.