Beginnercitrus asks, "How often do you water trees growing in CHC? Water when the CHC become semi-dry. Know that the top two inches or so will dry rather quickly, but the chips below the top two inches, which are in the tree's root zone, will stay wet/moist for an extended period. It is the root zone layer that you need to acertain. By the way, it is a real blessing that the top couple inches dry out quickly, because of this CHC containers almost never have a problem with fungus gnats, or stem rot. - Millet