Do Asiatic lilies bloom only once and require indoor care during winter? Sterile soil is basically a desert in a pot. Most store bought 'potting mixes' are heat treated until they're biologically dead. While that sounds clean, it actually means your plants are living in A Beautiful Dogwood Bonsai Tree Shop 'Bird's Nest Fern Asplenium nidus' Care & Info Planet Desert Gallery Bonsai Wire Trees NeroWireArt