Speed Up Fire Leaf Farming
The first step is to learn Northrend Herbalism, you can learn it from Edward Egan at the old Dalaran. (43.16, 33.72)
Fire Leaf farming can only be farmed here. A flower there is near water.
To speed up the farming you can use:
Darkmoon Firewater: Allows faster gathering of resources and slightly increases your size for 1 hour (5 min. cooldown)
Fire Leaf Route 1 – Borean Tundra
There is only this route to farm Fire Leaf. you also find Goldclover flowers in the area. Follow the water around and farm a lot of them. The Fire leaf is also called Firethorn on the map.