The study results of the effect of new liquid fertilizer Malham on the yield and quality of winter wheat grain are presented. The aim of the investigation was to study the influence of seeds treatment with a new liquid organic fertilizer Malham on yield and quality of winter wheat grain (cv Kuialnic). The seed treatments with liquid organic fertilizer Malham improved plant growth and productivity of winter wheat cultivated on chernoziom carbonate of the Republic of Moldova. The use of this fertilizer increased photosynthetic pigments concentration in leaves. The maximum yield of winter wheat grain registered by fertilizer application at rate 2 L/t of seeds. It was established that seeds treatment increases winter wheat grain productivity by 0,4 t/hectare or 14%. Organic fertilizer significantly increased the content of crude protein and crude gluten in the winter wheat grain. Thus, seed treatment with organic fertilizer Malham is an effective approach to increase winter wheat production.