The aim of the study was to determine plant height, number of shoots per unit area and dry matter yield of (Miscanthus x giganteus) grass (in autumn and spring date of harvest) fertilized with solid manure (10, 20 and 30 t/ha) and with mineral fertilizers (50 and 100 kg N/ha) in the fifth year of cultivation. In the fifth year of cultivation (2015) there wasn't significant difference in average plant heights of miscanthus grass between fertilization treatments (P>0.05). Average height between treatments was 3.31 m, which exceeds miscanthus plant heights in different European countries. Equally in the fifth year of cultivation there wasn't significant difference between number of shoots per square meter between fertilization treatments (P>0.05). Average number of shoots per square meter was 54.91. In the fifth year of cultivation average yield of miscanthus in autumn date of harvest was 36.03 t ST/ha, and difference between fertilization treatments were not statistically significant (P>0.05). In the spring date of harvest the average yield was 23.61 t ST/ha, without significant differences between fertilization treatments (P>0.05). In the spring date of harvest there was a decrease of yield of dry matter of miscanthus by 34.5% compared to the autumn harvest date (P<0.05). This is a common occurrence with miscanthus who survives over the winter period on the field because there is a decline in leaf and inflorescence. However with this free drying it gets better raw material for combustion, and fell off plant parts increase soil organic matter and it's fertility. It can be concluded that fertilization of different sources and quantities of nitrogen has not significantly affected the plants height, number of shoots and dry matter yield of Miscanthus x giganteus grass in the fifth year of cultivation.