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Phytoextraction is a cost-effective technique to remediate contaminated soil. The efficiency of the phytoextraction process is limited by the slow growth, small biomass production of hyper-accumulator plants, and lower phytoavailability of contaminants in soil. The study is focused on comparing the efficiency of the three reported accumulator plants for phytoextraction of zinc (Zn) and copper (Cu) from contaminated soil and their effect on the bioavailability/toxicity of the elements after harvest. In a pot experiment, sunflower, marigold, and spinach were grown in Zn and Cu-contaminated soil. After harvest, the effect of phytoextraction on the distribution of Zn and Cu in various soil-solid phases was studied through a fractionation study as an indicator of bioavailability. The efficiency of phytoextraction was compared in terms of the metal uptake ability of the plants. The highest biomass yield of accumulator plants was …