Rich and nutrient potting soil. Potted plant roots can't seek out nutrition in the ground, so you have to bring it to them. That is why Happy Frog Potting Soil is amended with soil microbes that can help improve root efficiency and encourage nutrient uptake. Between the earthworm castings, bat guano, and aged forest products, your container plants have never felt so good. When using conatiner gardens, fill container with soil 1 inch (2.5 cm) below top edge of the pot. Water thoroughly after planting. For best results, feed your plants with FoxFarm fertilizer products during growth and bloom seasons. For housplants, water thoroughly after planting. In established container gardens, top dress a 3-inch (7.5 cm) layer of potting soil around existing plants and carefully work into the soil. Water thoroughly. For trees, shrubs, and roses select a container 2 to 3 times the diameter of the plants root mass and 3 to 6 inches (7.5 to 15 cm) deeper. Place enough potting soil into the container so that the root mass is positioned at the correct height. Secure plant in place while adding more potting soil around the root mass until the container is almost full.