wow classic

You need Herbalism 105 to gather this herb. Duskwood Desolace Wetlands

You need Herbalism 100 to gather this herb. Stonetalon Mountains Hillsbrad Foothills

You need Herbalism 85 to gather this herb. Ashenvale Darkshore

You need Herbalism 70 to gather this herb. Stonetalon Mountains (Horde) Darkshore (Alliance)

You need Herbalism 50 to gather this herb. Silverpine Forest (Horde) Silverpine Forest is a great zone to farm Mageroyal (as well as Briarthorn). Darkshore (Allianz) Darkshore is not too bad either. If you are alliance, you can very well go here.

You need Herbalism 1 to gather this herb. Tirisfal (Horde) Tirisfal is the best zone for Horde players to farm Silverleaf as well als Peacebloom. There is a Herbalism trainer in Brill also. Elwynn Forest (Alliance) Alliance players do farm these two herbs