Old School RuneScape Wiki
Old School RuneScape Wiki

Guam leaf detail.png

Guam leaves are the first herbs that a player can clean, with a Herblore level of 3, giving 2.5 Herblore experience. They are used to make attack potions, for fuelling swamp lizards in the form of guam tar, and for making Guthix rest potions, after completing the related segment of the One Small Favour quest. Guam leaves can be grown in a herb patch with a Farming level of 9.

Guam leaves, along with Marrentills, are used in the Lunar Diplomacy quest to make Guam-marr vials for 84 experience per herb. The vial can then be destroyed and received again from Baba Yaga. Only a short trip to a nearby water source is required. This is a good way of getting rid of the Guams/Marrentills herbs for about 35k experience per hour.


Potion/item Level Secondary ingredient XP Effect
Attack potion(3).png Attack potion

Herblore icon.png 3

Eye of newt 25 Boosts the player's Attack level by 3-12 (3 + 10% of Attack level, rounded down).
Guam tar.png 15 Guam tars

Herblore icon.png 19

15 Swamp tar 30 Ammunition for the Swamp lizard. Bait when hunting Swamp lizards