So the first 50 levels should be really easy. You can find Peacebloom and Silverleaf in abundance around your main starting area (not in it, around it).
Then back up to Solliden Farmstead again. Just do circuits round the base of Thunderbluff picking Silverleaf and Peacebloom.
This TBC Herbalism guide will show you the fastest and easiest way to level your Herbalism skill from 1 to 375.
