The goal of this research was to evaluate the quality of seeds and phytomass of the non-native species Amaranthus hypochondriacus grown in an experimental field of the National Botanical Garden (Institute), Chişinău, Republic of Moldova. It has been found that the prepared silage was characterized by pleasant smell, its pH was 3.86, it contained 13.4 g/kg DM lactic acid, 5.8 g/kg DM acetic acid, 167 g/kg CP, 348 g/kg ADF, 516 g/kg NDF, 45 g/kg ADL, 158 g/kg HC, 303 g/kg Cel, with feed value RFV=111, 10.05 MJ/kg ME and 6.02 MJ/kg NEl. The biochemical methane potential of the silage substrate made from Amaranthus hypochondriacus reached 302 l/kg ODM. The Amaranthus hypochondriacus seeds contained 180.8 g/kg protein, 82.3 g/kg fats, 53.2 g/kg crude fibre, 657.4 g/kg nitrogen free extract, 2.5 g/kg calcium and 2.0 g/kg phosphorus, the stalks contained 293 g/kg HC and 404 g/kg Cel. The theoretical ethanol potential from structural carbohydrates of the stalks averaged 421 L/t. The stalk biomass was characterised by moderate calorific values (18.0 MJ/kg) and ash content (2.3 %), the specific density of solid bio fuel, namely briquettes, reached 901 kg/m3. Amaranthus hypochondriacus can be exploited in many ways: as pseudo-grain and fodder and as feedstock in the production of renewable energy.