The FoxFarm website says it does.
" Happy Frog® Potting Soil
Handcrafted in the Humboldt Nation
Your potted plants deserve the best. Their roots can't seek out nutrients in the ground, so you have to bring it to them. That's why Happy Frog® Potting Soil is alive with beneficial microbes and fungi that help break down organic matter and feed the plant roots.
Between the earthworm castings, the bat guano, and the composted forest humus, your container plants have never felt so good. And don't worry–FoxFarm uses only the highest quality, premium ingredients–no cheap fillers, no topsoil, no sludge.
Garden tip: Happy Frog® Potting Soil is perfect for container gardens. Whether you're growing a ficus in the dining room, a geranium on the patio, or a lemon tree on the deck, use our Potting Soil full strength in your containers. For a spectacular harvest, add our Happy Frog® Fruit & Flower Fertilizer. Then sit back and enjoy the results.
Embrace the Vitality of Happy Frog!"
Happy Frog® Potting Soil