Nagrand Arrowbloom is an herb from the Warlord of Draenor and requires a level of around 550 in herbalism to efficiency. It is widely found in Nagrand and alike the Whiptail from Cataclysm, it usually favors wetlands or riversides but can still be found in grassy meadows. It appears to have green stems and a teal arrowhead as the flower. It can be dropped by Disturbed Podling at Talador and Ashran if you are not an herbalist. It can also be created by combining ten Nagrand Arrowbloom Petal together. You can either farm Nagrand Arrowbloom in the yellow area or follow the red route.
See below for maps and routes for where to farm Nagrand Arrowbloom in World of Warcraft: Warlords of Draenor.