How do you get bloodgrass without going into planes of Oblivion? I finished the main quest.

well after you complete the main quest some oblivion gates pop up in the wilderness ok mate

well wolfpred there is a number of ways to get bloodgrass after you complete the main quest. One is that bloodgrass grows around some of the oblivion gates (The one east of leyawin and the one near Cheydinhal) OR! you can buy blood grass from an alchemist (The main ingredient in the Imperial city is the best)