As organic plant production is based on nourishing the plants primarily through the soil ecosystem, plants should be produced on and in living soil in connection with the subsoil and bedrock.
Ós rud é go bhfuil táirgeadh plandaí orgánacha bunaithe ar phlandaí a chothú go príomha trí éiceachóras na hithreach, ba cheart na plandaí a tháirgeadh ar ithir agus in ithir bheo i dteagmháil leis an bhfo-ithir agus leis an mbuncharraig.