Herblore is just one of the many skills that can be trained in SageScape.
You can save a lot of money by making certain potions yourself instead of buying them from other players or the Grand Exchange. Herblore can be trained in various ways, such as cleaning herbs and mixing them with other potions or mixing them with vials.
If you want to learn how to make Overload Potions, please refer to the lower portion of the page.
In order to start herblore, the best place to start out is ::skillingarea.
The first person you are probably going to notice is "Zaff."
Zaff is the NPC that sells pretty much everything you are going to need to get 99 herblore, or making any potion that you want to make. Although there are some potions that can not be made with the materials in the store, you can obtain the others from the grand exchange.
One of the most common ways to train herblore is to buy grimy cadantines, since these are stackable, all you need to do is click a rather large amount of times to clean the herbs, and you will be gaining herblore experience.
Please note that Extremes and Overloads can be sold to the GE, but for a price of 1GP. Although this may just be a bug,and could very well be changed in the future, it is not recommended to sell these to the GE.