This study was carried out in the research area of Çanakkale Onsekiz Mart University Faculty of Agriculture between the years 2020-2021 in order to determine the above- and belowground biomass production along with the energy contents of leaves and stalk in sorghum sudangrass hybrid (SSH) cultivars depending on different harvesting practices. The experiment has been established according to the randomized complete block design using 4 replications, where the main plots contained the cultivars of SSH namely, Nutri Honey and Nutrima, while the sub-plots represented the different harvesting heights (30 cm, 60 cm, 90 cm, 120 cm, 150 cm and the physiological maturity stage). Fresh forage yield, leaf and stalk ratios alon with the number of root, TSBM, ME and SE values of leaf and stalk were examined during this study. The total fresh forage production of Nutri Honey (7323.0 kg/da) was higher than that of the Nutrima (7019.3 kg/da). Total fresh forage yield increased with the increase in crop height during the harvesting period. Leaf ratio decreased depending on the growth in sorghum crop, there was an increase in the stalk ratios of SSH cultivars. It has been determined that there was a positive relationship between the growth of crop height and root production. The digestibility and energy values of the leaves were found to be higher than the stem parts. Consequently, it has been recommended to cultivate both of the sorghum sudangrass hybrid (SSH) cultivars as the forage source under similar ecological conditions, and harvest the crop when reach at the height of 150 cm for obtaining double amount of yield during the cultivation period of sorghum.