Last time, we discussed our fertilising guide. Now, we look at one of those topics that all bonsai growers love to discuss. If you get a group of bonsai growers together, they will soon start discussing their preferred soil mixture. The basics Let’s start by defining soil medium. Conventionally, a ‘soil medium’ is a natural component in which plants grow. Soil can also be defined as a natural body consisting of layers that are composed of weathered mineral materials, organic