The global promotion of the use of renewables in the last decade has led to an increase in the amount of by-products – bioash, which need to be properly stored or reused. Industrialization, urbanization and agriculture have led to inorganic soil contamination, among which heavy metals are especially important as metals are relatively easily adsorbed by crops, entering the food chain and causing various health problems. Methods of remediation of metal-contaminated soils are usually time-consuming and financially demanding. Bioash is physico-chemically complex and alkaline (pH>12), which enables it to significantly change the chemistry of heavy metals in the soil. Therefore, the aim of the work was to investigate how the addition of two different doses (1% and 4% m/m) of bottom bioash (from the biomass cogeneration plant Viridas biomass, Babina Greda) in Cd-contaminated soil will affect Cd chemistry, vegetation parameters and mineral composition of industrial hemp (Cannabis sativa L., Henola variety). The research was conducted in controlled greenhouse conditions at the Faculty of Agriculture, University of Zagreb. The study confirmed that the addition of bioash had a positive effect on numerous vegetation parameters of the test culture; stem height was increased by 21%; the number of leaves increased by 10%, the dry biomass of test crop was increased by 35%, and the fresh biomass by 61% compared to the control. Also, in the same relationship with the addition of bioash, the pH reaction of metal-contaminated soil increased by 0.4 units (from 6.5 to 6.9) compared to the control soil. The addition of bioash had a negative effect on the uptake and concentration of Cd and most of the other analyzed metals in the analyzed organs of the test culture, with the exception of Cu. Accordingly, it can be concluded that the application of analyzed bottom bioash represents a promising material for reclamation of soils contaminated with metals.