| Summary: | The objective of this study was to compare the morphology of <i>M. spicata</i> and <i>R. officinalis</i> plants, and the relative abundance quantification, colony-forming units, ribotypes, and biofilm former bacteria under an inorganic fertilizer and the use of vermicompost leachate in the rhizosphere under a closed hydroponic system. In mint (<i>Mentha spicata</i>) plants treated with the vermicompost leachate, growth increase was determined mainly in root length from an average of 38 cm in plants under inorganic fertilizer to 74 cm under vermicompost leachate. In rosemary (<i>Rosmarinus officinalis</i>), no changes were determined between the two treatments. There were differences in the compositions of microbial communities: For <i>R. officinalis</i>, eight ribotypes were identified, seven for inorganic fertilizer and four for vermicompost leachate. For <i>M. spicata</i>, eight ribotypes were identified, three of them exclusive to vermicompost leachate. However, no changes were observed in microbial communities between the two treatments. Otherwise, some changes were observed in the compositions of these communities over time. In both cases, the main found phylum was Firmicutes, with 60% for <i>R. officinalis</i> and 80% for <i>M. spicata</i> represented by the <i>Bacillus</i> genus. In conclusion, the use of vermicompost leachate under the hydroponic system is a viable alternative to achieve an increase in the production of <i>M. spicata</i>, and for both plants (mint and rosemary), the quality of the product and the microbial communities that inhabited them remained unaltered.
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