Abstract: An aeration system for indoor and also outdoor plant life, fields, and grounds. In one form of the invention, moist air is injected into the root system of plant life so as to provide moisture proximate that plant nodules of the root system and thus foster growth. The water vapor introduced into the root system may be warmed and/or evaporated, as desired. In field and grounds use, perforate conduit is connected to the source of pressured air, water vapor, or other gases for the purpose of conditioning the fields and ground, either to remove moisture or to add moisture to plant life beneath, at, or even above the soil surface. The root system of trees may also be conditioned for regulating, relatively exactly, growth and dormant states.