Herblore is a skill that can be trained by buying herbs at the extra shops found by teleporting to Varrock. When you have the herbs, use them with a vial of water to get an unfinished potion. Then use one of the other items in the shop to finish the potion. This skill takes a long time to get up. But you ask where it is well you have find out
Just buy the items needed for making Attack potions and make those until 99 Herblore.
I myself did Ranging Potions which I believe may work a bit better than Attack until 99.
The Potion Ingredients
Guam-Vial-Eye Of Newt=Attack Potion
Irit-Vial-Eye Of Newt=Super Attack shit
Marrentil-Vial-Unicorn Horn Dust=Anti-Poison Potion
Tarromin-Vial-Limpwurt Root=Strength Potion
Harralander-Vial-Red Spider Eggs=Restore Poition
Rannarr-Vial-Snape Grass= Prayer Potion
Irit-Vial-Unknown Avantoe-Vial-Mort Myre Fungi=Energy Potion
Avantoe-Vial-Mort Myre Fungi = Super Energy Potion (Found in attempt to make a Energy Potion)
Kwuarm-Vial-Dragon Scale Dust= Weapon Poison Potion
Cadantine-Vial-Eye Of Newt = Super Attack
Dwarf Weed-Vial-Wine of Zamorak=Ranging Potion
kwaurm-vail-limpwort root=super strength
Plus if you max skill you can get reset.