Season of Discovery changes up the Classic WoW meta with lower level caps, which also limits what items you can craft and use. For the Herbalism profession (Herb Gathering), that means you’ll be farming lower level herbs for use in Alchemy recipes.
Phase 1 of Season of Discovery comes with a level cap of 25, and a level 26 requirement for Expert skills. That means the maximum skill you can reach with professions is Journeyman, or skill level 150. The exception is Tauren who get the Cultivation racial ability, allowing them to reach a skill level of 165. You can also use Herbalist’s Gloves to reach 155 (or even higher on a Tauren).
Alchemists will be looking for all kinds of herbs, so pretty much anything beyond the starting zones should be worth farming.
Here are all of the herbs that are used in Phase 1 of Season of Discovery. Click on a node in the “Where to Pick“column to see maps with spawn locations by zone.
I've been playing World of Warcraft on and off since vanilla, usually as a healer or caster and often as a guild leader. I play both retail and classic. I also love RPGs, sandboxes, and sims.