WoW Herbalism 1-525 Leveling Guide | Herbalism 1-70 - Apprentice Herbalism

Herbalism 1-525 leveling guide: Updated for Patch 4.0.3a - Cataclysm
Estimated Herbalism Leveling 1-525 Time: 3-4.5 hours for an average player.
Gold Made from Leveling Herbalism 1-525: 2,800g abouts depending on the player and the server's economy.
Suggestions: While picking herbs, I suggest every player have a decent amount of empty bag space, be repaired, +5 to herbalism gloves, blare some music, and most importantly, have fun!

Start by learning Apprentice Herbalism. This requires level 5. You can ask a guard in any major city to find where an Herbalism trainer is located.
Next, head out to any starting area and begin leveling Herbalism. The first 70 levels will come quick and are extremely easy. Although I only show Elwynn Forest and Tirisfal Glades below, players can easily level 1-70 in any starting area. These are mainly suggested for the flow of the guide and typical leveling areas.
Once you reach skill level 70, go to your trainer and learn Journeyman Herbalism. This requires level 10 and will allow you to reach Herbalism skill level 150.

WoW Herbalism 1-525 Leveling Guide | Herbalism 70-150 - Journeyman Herbalism

Even though Hillsbrad is mainly a Horde zone and possibly a bit higher in level than where you'd be leveling your character, I really suggest going there even if you're Alliance since this is by far the best place to level 70-150 easily using one zone. Using one zone will save tons on your travel time and thereby make getting to 525 quicker with less headaches.
Start by leveling your Herbalism following the 'green route'. Once you hit skill level 125, enter the red area and farm that until 150.

Once you hit skill level 150, head back to the trainer and learn Expert Herbalism. This requires level 20 and will allow you to reach skill level 225.

When you first get into either Western Plaguelands or Feralas you won't be able to farm Khadgar's Whisker until you reach skill level 160. These first 10 levels, or 5 with a glove enchant, will go super quick so don't sweat it too much.

Once you reach skill level 225, go to the trainer and learn Artisan Herbalism before changing zones. Artisan Herbalism requires level 35 and will allow you to reach Herbalism skill level 300.

Here your going to be hitting up Eastern Plaguelands from 225-285. This place is pretty good and you should have no problems leveling here. If you're looking for an alternative, you can try Thousand Needles.

Once you reach skill level 285, go to the trainer and learn Master Herbalism. Master Herbalism requires level 40 and will allow you to reach Herbalism skill level 375.

For skill levels 285-325 you'll want to head to Swamp of Sorrows. This zone is awesome and is packed with herbs everywhere. I have drawn a general route but once you get there you'll see that you really don't need one since the herbs are scattered about all over the place.

For here, you could go to Outlands after reaching 300 but Swamp of Sorrows is super easy to farm in and allows you to skip Hellfire Peninsula completely. I have included the Hellfire Peninsula map just in case but you shouldn't need it.

I've listed Zangarmarsh and Terrokar Forest below, but I've found Zangarmarsh to be a bit better.
Once you reach skill level 350, go to a trainer and learn Grand Master Herbalism. Grand Master Herbalism requires level 55 and will allow you to reach skill level 450.

Depending on your preference, you can go to either Nothrend starting areas; Howling Fjord or Borean Tundra. However, the zone after this that I suggest is Sholazar Basin which is just above Borean Tundra.

Sholazar Basin was one of the best farming zones for herbs back in Wrath. This also makes it great for leveling herbalism to 425.

Once you reach skill level 425, go to a trainer and learn Illustrious Grand Master Herbalism. Illustrious Grand Master Herbalism requires level 75 and will allow you to reach skill level 525.

Once you finish leveling Herbalism to 425, head to the new Cataclysm starting area, Mount Hyjal. This place is very easy to farm in and shouldn't take you long to get to 475.

Once you finish leveling Herbalism to 475, head to the new Cataclysm zone, Deepholm. This place was nerfed a little bit but is still very good. It requires you to be level 82 so if for some reason you want to hit 525 before that, stay in Mount Hyjal until 500 and then go to the rivers in Uldum for Whiptail.