Abstract: The invention concerns a plant conditioning preparation comprising a (i) water based extract of plant A, especially belonging to the genus Urtica, (ii) an oil based extract of plant B, especially belonging to the genus Salix, and (iii) an emulsifier. The invention further comprises a process for the production of the said plant conditioning preparation and a method for using such a preparation. In addition, a plant conditioning preparation obtainable by said process as well as a method and a use of a plant conditioning preparation for enhancing the immune system of a plant are also disclosed.