RhiZoFert treated Peace Lily, cv. Alfetta/Lima, grown in a peat-based substrate was after 3 repeated drought stress cycles on average 0.7 % taller and had on average 2.9 % broader leaves, 2.4 % longer leaves, 3 % less fresh weight, 2.6 % less dry weight and 0.6 % less root development, during drought stress RhiZoFert had no significant effects on the stomatal conductance compared to the untreated control grown in the same drought stress conditions. Only negative significant effect on plant height of cv. Lima. The effect on the total chlorophyll content and the content of total phenolics varied between the different drought cycles and cultivars; RhiZoFert lowerd the total chlorophyll content of both cultivars during drought stress compared to the untreated controls.