Minecraft wiki entry for Dirt_farming, associated text: When an azalea grows, whichever block it grows on turns into rooted dirt, which can then be turned into path blocks and then mined by using a shovel without Silk Touch. Or, you can right-click the rooted dirt and you will get a root along with a block of regular dirt. This can be partnered with a stone generator, moss blocks and a TNT duper to renewably farm dirt. Here is a tutorial video on how to build a farm that will give you infinite dirt, moss and wood.