Vetiver grass (Vetiveria zizanioides (L.) Nash) used in this study was the (bare root) Songkla-3 ecotype obtained from Chachoengsao Development Station. Phenol was 99% purity obtained from Panreac (Barcelona, Spain). Wastewater and soil used in laboratory studies were obtained from Mr. Manus’s pond and surrounding area to represent real contaminated wastewater and soil. Wastewater was spiked with phenol for experimental studies.