Minecraft wiki entry for Surviving_in_a_single_area_indefinitely, associated text: A tree farm should also be set up so as to gain maximum yield harvest, so place your saplings around 3 - 5 blocks apart, with the exact distance between saplings depending on what tree you're planting. You now have a rather steady source of wood for repairs and pickaxes or other needful things. Now, if you're on any other difficulty except for peaceful mode, you will need to have a crop farm. If this is a wheat farm the best way to go about doing this is to make an infinite water supply.