Herblore is one of the hardest & most expensive skill on runescape. The fastest way to get to 99 is to make potions (instead of cleaning herbs). Make sure you have at least 200M GP if you plan on getting to 99 herblore. Here we go!
Complete the Druidic Ritual quest to gain access to the herblore skill. Completion of the quest will also boost you to level 3 herblore.
*You need to make 340 attack potions
(guams + eye of newt)
*This will take you about 20 min.
*You need to make 322 energy potions
(harralander + chocolate dust)
*This will also take you about 20 minutes
*You will need to make 1006 prayer potions
(ranarr + snape grass)
*This will Take you about 1 hour
*You will need to make 26681 super energy potions
(avantoe + mort fungus)
*This will take about 24 hours
*You will need to make about 16322 ranging potions
(Dwarf weed + wine of zamorak)
*This will take you about 13 hours
*You will need to make 6896 extreme attack potions
(super attack potion + avantoe)
*You can make 28527 extreme magic potions
(Magic potion + ground mud runes)
*This will take about 26-27 hours