In the house,orchids are grown in pots filled with chips of bark, stones,treefern or some other loosely packed material,which keeps roots well-aerated and permits water to drain quickly.Nothing repeat,nothing kills an orchid faster than letting it sit in a water logged pot,since a lack of oxygen will cause the roots to suffocate and rot. Water orchids thoroughly, usually about once a week,then allow them to dry slightly before watering again.orchids are better equipped to withstand periods of forgetfulness than thy are to being overwatered.