Neither ingredient makes a good planting medium on its own, but the combination makes an effective all-purpose potting soil. Some products may also contain a small amount of limestone to balance soil pH.
This pile of potting soil does look like a sandwich because as we added the stone to the top of the pile is spilled down over the sides, but there actually are about 4 different layers of material in this pile. As we start taking soil out of the pile you can clearly see the many layers.
If you’re a new gardener (or even if you’ve been at it awhile), choosing soil for potted plants from the many types of potting soil available in garden centers can feel a bit overwhelming. However, once you have some knowledge of the basic components of potting soil and the most common potting soil ingredients, you can select the best product for your particular needs. Read on for helpful potting soil information.
As you can see, with just a little mixing and tossing the mixed soil on top of the pile we quickly have plenty of usable potting soil without having to mix the entire pile all at one time.