Firebloom

Firebloom requires herbalism skill point of 205 to gather and is usually found at hot regions such as deserts at Tanaris or the Searing Gorge, other areas like  Blasted Lands and Badlands will also spawn Firebloom. The zone with the most Firebloom spawn would have to be Searing Gorge near lava flows.

See maps below for route to farm Firebloom.